Snc1p Astronomy Unit Review Quiz
This quiz is good practice for your Astronomy Unit Test. Try this quiz as many times as you'd like. Each time you try it, you will be shown ten random questions from a larger question bank. The more you try it, the more different questions you'll see. Good luck!
- 1.
Which of these planets is NOT a "Gas Giant"?
- A.
Mars
- B.
Jupiter
- C.
Neptune
- D.
Uranus
Correct Answer
A. MarsExplanation
Mars is not a "Gas Giant" because it is primarily composed of rocky material rather than being predominantly made up of gases like Jupiter, Neptune, and Uranus. Gas giants are characterized by their massive size and thick atmospheres composed mostly of hydrogen and helium. In contrast, Mars is a terrestrial planet with a thin atmosphere consisting mainly of carbon dioxide.Rate this question:
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- 2.
Which of these planets is closest in size to Earth?
- A.
Mercury
- B.
Neptune
- C.
Venus
- D.
Uranus
Correct Answer
C. VenusExplanation
Venus is the closest planet in size to Earth. While Mercury is the closest planet to the Sun, it is significantly smaller than Earth. Neptune and Uranus are both larger than Earth, making Venus the most similar in size to our planet.Rate this question:
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- 3.
What is Earth's rotational period
- A.
365 days
- B.
1 month
- C.
1 week
- D.
24 hours
Correct Answer
D. 24 hoursExplanation
The Earth's rotational period refers to the time it takes for the Earth to complete one full rotation on its axis. This period is commonly known as a day and is equal to 24 hours.Rate this question:
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- 4.
An astronomer has discovered a new galaxy. It has a long central portion and two large arms, looking somewhat like a backwards letter "S". What type of Galaxy is it?
- A.
Spiral
- B.
Barred Spiral
- C.
Elliptical
- D.
Irregular
Correct Answer
B. Barred SpiralExplanation
The description of the galaxy having a long central portion and two large arms in the shape of a backwards letter "S" suggests that it is a barred spiral galaxy. Barred spiral galaxies have a bar-shaped structure in the center, which is surrounded by spiral arms. The arms of a barred spiral galaxy extend from the ends of the bar, creating the appearance of a "S" shape. This distinguishes it from a regular spiral galaxy, which does not have a bar-shaped structure in the center.Rate this question:
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- 5.
What is meant by the terms "gibbous"?
- A.
It's another way of saying high tide
- B.
It's an intermediate moon phase, in transition between two of the major phases
- C.
It's a deformity on the surface of a moon, like a crater
- D.
It's a shape of galaxy
Correct Answer
B. It's an intermediate moon pHase, in transition between two of the major pHasesExplanation
The term "gibbous" refers to an intermediate moon phase that occurs between the major phases of a full moon and a half moon. During this phase, more than half of the moon is illuminated, but it is not fully lit like a full moon. It is a transitional phase that occurs as the moon moves from a full moon to a half moon or vice versa.Rate this question:
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- 6.
What do you see in the sky when it is a new moon?
- A.
Half of the moon, fully illuminated
- B.
A quarter of the moon illuminated
- C.
Nothing, no moon
Correct Answer
C. Nothing, no moonExplanation
During a new moon, the moon is positioned between the Earth and the Sun, causing the side of the moon that faces us to be completely dark. This means that we cannot see the moon at all, hence the answer "Nothing, no moon".Rate this question:
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- 7.
When the Earth's ocean are experiencing a Spring Tide, where is the moon, relative to the Earth and the Sun?
- A.
The moon is at a 90 degree angle to the Earth, which is aligned with the sun.
- B.
The moon and Earth are on opposite sides of the sun
- C.
The moon, sun, and Earth are all aligned.
- D.
The moon is in Earth's shadow.
Correct Answer
C. The moon, sun, and Earth are all aligned.Explanation
During a Spring Tide, the moon, sun, and Earth are all aligned. This alignment causes the gravitational pulls of the moon and the sun to combine, resulting in higher high tides and lower low tides. The gravitational force of the sun reinforces the gravitational force of the moon, leading to the maximum tidal range.Rate this question:
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- 8.
When the Earth's oceans are experiencing a Neap Tide, where is the moon in relation to Earth and the Sun?
- A.
The moon is at a 90 degree angle to Earth, which is aligned with the Sun
- B.
The Moon and Earth are on opposite sides of the Sun
- C.
The Moon, Earth and the Sun are all aligned
- D.
The Moon is in Earth's shadow.
Correct Answer
A. The moon is at a 90 degree angle to Earth, which is aligned with the SunExplanation
During a Neap Tide, the moon is at a 90 degree angle to Earth, which means it is aligned with the Sun. This alignment causes the gravitational pull of the moon and the sun to partially cancel each other out, resulting in a weaker tidal effect. Therefore, the Earth's oceans experience lower high tides and higher low tides during a Neap Tide.Rate this question:
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- 9.
This is Ursa Minor, an important northern hemisphere constellation. Why is it important?
- A.
It is also called the Little Dipper
- B.
The star at the end is Polaris, the North Star, very important in navigation
- C.
The four stars in the body of the constellation help us locate Mars
- D.
It is on the flags of Australia and New Zealand.
Correct Answer
B. The star at the end is Polaris, the North Star, very important in navigationExplanation
The correct answer is that Ursa Minor is important because the star at the end is Polaris, the North Star, which is very important in navigation. Polaris is a highly visible and stable star that has been used for centuries as a navigational tool. It sits almost directly above the North Pole, making it a reliable point of reference for determining direction, especially in the northern hemisphere. Sailors, explorers, and travelers have relied on Polaris to guide them on their journeys, making it an essential star for navigation.Rate this question:
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- 10.
This is the constellation Orion. When is Orion most visible in the night sky?
- A.
Winter
- B.
Spring
- C.
Summer
- D.
Fall
Correct Answer
A. WinterExplanation
Orion is most visible in the night sky during winter. This is because during this season, Orion rises earlier in the evening and sets later in the morning, providing a longer duration for observation. Additionally, the constellation is positioned in a way that it is high in the sky during winter nights, making it more easily visible to observers.Rate this question:
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- 11.
This is the constellation Cassiopeia. It is one of the circumpolar constellations. What does that mean?
- A.
It is only visible at the North Pole
- B.
The North Star is part of this constellation
- C.
The name is that of a mythological queen, Cassiopeia
- D.
It shifts in position around the North Star over the course of a year.
Correct Answer
D. It shifts in position around the North Star over the course of a year.Explanation
A circumpolar constellation is a constellation that never sets below the horizon from a particular location on Earth. This means that it is always visible throughout the year, regardless of the time or season. The given answer correctly states that Cassiopeia is a circumpolar constellation because it shifts in position around the North Star over the course of a year. This means that Cassiopeia is always visible in the northern hemisphere and never sets below the horizon.Rate this question:
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- 12.
Which of these statements correctly describes what happens during a Solar Eclipse?
- A.
The Earth's shadow falls on the moon's surface, obscuring it
- B.
The moon aligns with the sun during daytime, blocking sunlight
- C.
The moon is located on the opposite side of the Earth
- D.
The Sun shifts and enters into the moon's shadow.
Correct Answer
B. The moon aligns with the sun during daytime, blocking sunlightExplanation
During a solar eclipse, the moon aligns with the sun during daytime, blocking sunlight. This alignment causes the moon to cast a shadow on the Earth's surface, resulting in a temporary darkening of the sky. The moon's position between the Earth and the sun blocks the direct sunlight from reaching certain areas on Earth, creating the eclipse phenomenon.Rate this question:
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- 13.
Which of these statements correctly describes what happens during a Lunar Eclipse?
- A.
The Moon cannot be seen because it's on the opposite side of Earth
- B.
The moon is visible in the daytime sky, but only right after dawn or right before dusk
- C.
The Moon crosses into Earth's shadow, preventing reflection of sunlight
- D.
Earth and the Sun align so that the Earth reflects more sunlight than the moon
Correct Answer
C. The Moon crosses into Earth's shadow, preventing reflection of sunlightExplanation
During a Lunar Eclipse, the Moon crosses into Earth's shadow, which prevents the reflection of sunlight. This phenomenon occurs when the Earth is directly between the Sun and the Moon, causing the Moon to pass through the Earth's shadow. As a result, the Moon appears darker and may even take on a reddish hue during a total lunar eclipse.Rate this question:
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- 14.
Which of these is NOT a correct difference between planets and moons?
- A.
Planets and moons both rotate on their axis
- B.
Planets and moons both revolve on a set path or orbit
- C.
Some planets have atmospheres, but moons don't
- D.
Planets exert gravitational force on their moons, but moons can't do this.
Correct Answer
D. Planets exert gravitational force on their moons, but moons can't do this.Explanation
The correct difference between planets and moons is that planets exert gravitational force on their moons, but moons cannot exert gravitational force on planets. Planets and moons both rotate on their axis, both revolve on a set path or orbit, and some planets have atmospheres while moons do not.Rate this question:
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- 15.
Which of these is not a terrestrial object in our solar system?
- A.
Moons
- B.
Sun
- C.
Asteroids
- D.
Meteors
Correct Answer
B. SunExplanation
The Sun is not considered a terrestrial object in our solar system because it is a star, not a solid planet or moon. Terrestrial objects are those that are primarily composed of rock and metal, like the Earth and its moon. The Sun, on the other hand, is a massive ball of hot gas and plasma, and it serves as the central source of light and heat in our solar system.Rate this question:
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- 16.
Where in our Solar System can we find asteroids?
- A.
The Asteroid Belt between Mars and Jupiter
- B.
The Kuiper Belt beyond Neptune
- C.
The rings of Saturn
- D.
All of these are possible
Correct Answer
D. All of these are possibleExplanation
All of these options are possible because asteroids can be found in different regions of our Solar System. The Asteroid Belt, located between Mars and Jupiter, is a region where many asteroids are found. The Kuiper Belt, which is beyond Neptune, is another area where asteroids can be found. Additionally, asteroids have also been discovered in the rings of Saturn. Therefore, all of these options are correct as they represent different locations where asteroids can be found in our Solar System.Rate this question:
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- 17.
The planet with the shortest orbital period is...
- A.
Mercury
- B.
Venus
- C.
Earth
- D.
Mars
Correct Answer
A. MercuryExplanation
Mercury has the shortest orbital period among the given options. Orbital period refers to the time taken by a planet to complete one orbit around the sun. Mercury's orbital period is approximately 88 Earth days, making it the planet with the shortest orbital period in our solar system.Rate this question:
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- 18.
The planet that rotates on its side is...
- A.
Jupiter
- B.
Saturn
- C.
Uranus
- D.
Neptune
Correct Answer
C. UranusExplanation
Uranus is the correct answer because it is the only planet in our solar system that rotates on its side. While most planets rotate on an axis that is roughly perpendicular to their orbital plane, Uranus is tilted at an extreme angle of about 98 degrees. This means that instead of spinning upright like a top, Uranus essentially rolls on its side as it orbits the Sun. This unique axial tilt is believed to have been caused by a collision with a massive object early in the planet's history.Rate this question:
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- 19.
The largest planet in our Solar system is...
- A.
Earth
- B.
Mars
- C.
Jupiter
- D.
Uranus
- E.
Neptun
Correct Answer
C. JupiterExplanation
Jupiter is the largest planet in our Solar system. It has a diameter of about 143,000 kilometers, which is more than 11 times the diameter of Earth. Its massive size is due to its composition, mainly consisting of hydrogen and helium. Jupiter also has a strong gravitational pull, which is why it is often referred to as a gas giant. Its size and composition make it significantly larger than the other planets in our Solar system, including Earth, Mars, Uranus, and Neptune.Rate this question:
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- 20.
This planet was named after the Roman god of the sea because of its blue colour. Which planet is this?
- A.
Earth
- B.
Mars
- C.
Uranus
- D.
Neptune
Correct Answer
D. NeptuneExplanation
Neptune is the correct answer because it was named after the Roman god of the sea due to its blue color. The planet's vibrant blue hue is caused by the presence of methane gas in its atmosphere, which absorbs red light and reflects blue light. This resemblance to the color of the sea led to its name being associated with the god of the sea in Roman mythology.Rate this question:
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- 21.
Which planet do astronomers think might have had life on it in the distant past?
- A.
Mercury
- B.
Venus
- C.
Mars
- D.
Pluto
Correct Answer
C. MarsExplanation
Astronomers believe that Mars might have had life on it in the distant past. This is because Mars has features that suggest the presence of liquid water in the past, such as dried-up riverbeds and polar ice caps. Water is a key ingredient for life as we know it, so the presence of water on Mars increases the possibility that life may have once existed there. Additionally, recent discoveries of organic molecules and methane on Mars further support the hypothesis that Mars could have supported life in the past.Rate this question:
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- 22.
Which is the only planet with liquid water and oxygen?
- A.
Venus
- B.
Earth
- C.
Mars
- D.
Jupiter
Correct Answer
B. EarthExplanation
Earth is the only planet in our solar system that has both liquid water and oxygen. Liquid water is essential for the existence of life as we know it, and oxygen is necessary for the respiration of many organisms. While Venus does have traces of water vapor in its atmosphere, it does not have liquid water on its surface. Mars has some frozen water, but it does not have liquid water in abundance. Jupiter is a gas giant and does not have a solid surface or conditions suitable for liquid water and oxygen. Therefore, Earth is the correct answer.Rate this question:
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- 23.
What causes Mars' red colour?
- A.
Toxic gases in the atmosphere
- B.
Deposits of rubies and other red gemstones
- C.
Rust - Iron oxide deposits
- D.
A visual distortion seen from Earth
Correct Answer
C. Rust - Iron oxide depositsExplanation
The red color of Mars is caused by iron oxide deposits, commonly known as rust, on its surface. These iron particles combine with oxygen in the atmosphere, creating a reddish-brown color. This phenomenon gives Mars its distinct red appearance when viewed from Earth.Rate this question:
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- 24.
What is the red spot on Jupiter?
- A.
A huge deposit of the mineral rhodonite
- B.
A violent storm system more than twice the size of Earth
- C.
A crater left after the formation of the Asteroid Belt
- D.
A cloud system in its atmosphere
Correct Answer
B. A violent storm system more than twice the size of EarthExplanation
The red spot on Jupiter is a violent storm system more than twice the size of Earth. This storm, known as the Great Red Spot, has been observed for centuries and is a prominent feature on the planet's surface. It is believed to be a high-pressure system that has been sustained for hundreds of years, causing the gases in Jupiter's atmosphere to create a distinct red color. The storm's size and longevity make it a fascinating phenomenon to study and understand.Rate this question:
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- 25.
Now that he's no longer part of our Planet Pals, what is Pluto's status?
- A.
Pluto is considered a satellite of its former moon, Charon
- B.
Pluto is considered an asteroid
- C.
Pluto is still a planet, just a Dwarf Planet.
- D.
Pluto is now just a dog owned by a talking sentient mouse.
Correct Answer
C. Pluto is still a planet, just a Dwarf Planet.Explanation
After being reclassified by the International Astronomical Union (IAU) in 2006, Pluto is no longer considered a full-fledged planet but rather a dwarf planet. This means that while it still retains its planetary status, it does not meet all the criteria to be classified as a regular planet.Rate this question:
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- 26.
What is a supernova?
- A.
A star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.
- B.
A type of galaxy containing forty solar systems, clustered in one part of the Milky Way
- C.
The first stage of a star's life
- D.
A type of star pattern found within a constellation
Correct Answer
A. A star that suddenly increases greatly in brightness because of a catastropHic explosion that ejects most of its mass.Explanation
A supernova is a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass. This explosion occurs when a massive star reaches the end of its life and collapses under its own gravity. The core of the star collapses, causing a massive release of energy and the ejection of its outer layers into space. This explosion can briefly outshine an entire galaxy and release an enormous amount of energy and matter into the surrounding space.Rate this question:
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- 27.
What is a neutron star?
- A.
A dense area of matter found at the center of black hole
- B.
A rapidly rotating celestial body that emits pulses of radiation at an extremely high rate
- C.
The material that makes up the core of a spiral galaxy
- D.
A small, dense star left over after the violent death of a larger star, which was not large enough to form a black hole
Correct Answer
D. A small, dense star left over after the violent death of a larger star, which was not large enough to form a black holeExplanation
A neutron star is a small, dense star that forms after a larger star undergoes a violent death, such as a supernova explosion. It is not large enough to form a black hole, but it is extremely compact and dense, composed mostly of neutrons. Neutron stars are incredibly dense, with a mass greater than that of the Sun packed into a sphere only about 12 miles in diameter. They have strong gravitational fields and emit radiation, including X-rays and gamma rays.Rate this question:
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- 28.
What is a nebula?
- A.
A remnant of a red supergiant after it expands
- B.
A vast cloud of gas and dust in outer space where stars begin their lives
- C.
Any star on the 'main sequence', or the 'adulthood' of its lifespan
- D.
The core of a star such as a yellow dwarf.
Correct Answer
B. A vast cloud of gas and dust in outer space where stars begin their livesExplanation
A nebula is a vast cloud of gas and dust in outer space where stars begin their lives. It is a region where gravity causes the gas and dust to come together, forming a dense core. As the core becomes denser, it starts to collapse under its own gravity, eventually leading to the formation of a star. Nebulas can vary in size and shape, and they are often illuminated by nearby stars or by the energy released during the star formation process.Rate this question:
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- 29.
What is a protostar?
- A.
Something that is more dense than a nebula, but hasn't begun nuclear fusion yet
- B.
Something that is beginning to look like a star; shiny and bright when viewed from Earth
- C.
Something that is like a star, but is not a star
- D.
Something that happens after a star undergoes a CME
Correct Answer
A. Something that is more dense than a nebula, but hasn't begun nuclear fusion yetExplanation
A protostar is a stage in the formation of a star. It is a dense region of gas and dust that has not yet begun nuclear fusion, which is the process that powers a star. This means that while it is more dense than a nebula, it has not yet reached the point where it can generate energy through nuclear reactions.Rate this question:
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- 30.
What is a CME in astronomy?
- A.
It is a certificate earned by doctors and nurses in Continuing Medical Education
- B.
A core-main sequence event, which is the mid-stage of a star's lifespan
- C.
A mass ejection of energy (in many different forms) from the Corona of the Sun
- D.
It is the Canadian Military engineers, responsible for protecting Canada from asteroids.
Correct Answer
C. A mass ejection of energy (in many different forms) from the Corona of the SunExplanation
A CME in astronomy refers to a mass ejection of energy from the Corona of the Sun. This phenomenon involves the release of a large amount of charged particles, such as protons and electrons, into space. CMEs can occur due to the intense magnetic activity on the Sun's surface, resulting in a burst of energy that is expelled into the solar system. These ejections can have various forms, including solar flares and coronal mass ejections, and can have significant impacts on space weather and Earth's magnetosphere.Rate this question:
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- 31.
What type of star is capable of creating a black hole?
- A.
Massive stars
- B.
Medium sized stars
- C.
Low mass stars
- D.
Dwarf stars
Correct Answer
A. Massive starsExplanation
Massive stars are capable of creating black holes. This is because massive stars have a high enough mass to undergo a supernova explosion at the end of their life. During this explosion, the core of the star collapses under its own gravity, forming a black hole. Medium sized stars and low mass stars do not have enough mass to undergo this process. Dwarf stars, on the other hand, are not massive enough to create a black hole.Rate this question:
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- 32.
Which of the following are the main fuels of stars like our Sun?
- A.
Oxygen and Carbon Dioxide
- B.
Hydrogen and Helium
- C.
Neon and Helium
- D.
Hydrogen and Oxygen
Correct Answer
B. Hydrogen and HeliumExplanation
Hydrogen and helium are the main fuels of stars like our Sun. These elements undergo nuclear fusion in the core of the star, where hydrogen atoms combine to form helium, releasing a tremendous amount of energy in the process. This fusion reaction powers the star, providing the heat and light that we receive from the Sun. Oxygen and carbon dioxide are not fuels for stars, and neon is not a significant fuel source either. Therefore, the correct answer is hydrogen and helium.Rate this question:
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- 33.
At the end of its lifetime, what will our Sun become?
- A.
It will explode violently and form a neutron star
- B.
It will fade quietly and become a white dwarf
- C.
It will collapse upon itself and become a black hole
- D.
It will expand and become a red supergiant
Correct Answer
B. It will fade quietly and become a white dwarfExplanation
As the Sun exhausts its nuclear fuel, it will enter the final stages of its life. It will first expand and become a red giant, engulfing the inner planets. Eventually, it will shed its outer layers, leaving behind a hot, dense core called a white dwarf. This white dwarf will slowly cool down over billions of years, fading away into a dim, dead remnant of its former self. Therefore, the correct answer is that the Sun will fade quietly and become a white dwarf.Rate this question:
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- 34.
How often do tides rise and fall on Earth?
- A.
Once a week
- B.
Once every 24 hours
- C.
Every 12 hours
- D.
Every 6 hours
Correct Answer
D. Every 6 hoursExplanation
Tides rise and fall on Earth every 6 hours. This is because tides are caused by the gravitational pull of the moon and the sun on the Earth's oceans. As the Earth rotates on its axis, different parts of the planet experience high and low tides. This cycle repeats approximately every 6 hours, resulting in two high tides and two low tides in a 24-hour period.Rate this question:
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- 35.
Why do we only see one side of the moon?
- A.
The moon doesn't rotate on its axis
- B.
The moon does rotate, but it's so slow we will never experience a full rotation in our lifetimes
- C.
The moon rotates once in the same amount of time it takes to orbit Earth
- D.
Only one side of the moon reflects light; the other side absorbs light.
Correct Answer
C. The moon rotates once in the same amount of time it takes to orbit EarthExplanation
The moon rotates once in the same amount of time it takes to orbit Earth. This means that the same side of the moon is always facing the Earth, while the other side remains hidden. As a result, we only see one side of the moon from Earth.Rate this question:
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- 36.
Which of these is a correct explanation of why Earth experiences seasons?
- A.
The Sun shifts during the year: it is higher in the sky in the summer, and lower in winter
- B.
The Earth's axis is tilted roughly 24o, so as we orbit the Sun, one hemisphere is always getting more energy from the Sun
- C.
The Sun keeps the Earth in orbit due to the force of its gravity
- D.
The Sun's gravitational pull is different during different parts of Earth's orbit
Correct Answer
B. The Earth's axis is tilted roughly 24o, so as we orbit the Sun, one hemispHere is always getting more energy from the SunExplanation
The correct explanation for why Earth experiences seasons is that the Earth's axis is tilted roughly 24o. As the Earth orbits the Sun, one hemisphere is always getting more energy from the Sun. This tilt causes the angle at which sunlight hits the Earth's surface to change throughout the year, resulting in different seasons.Rate this question:
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- 37.
Which of these is a correct explanation of why we have tides on Earth?
- A.
The Sun and the Moon both exert a gravitational pull on Earth's surface.
- B.
As the atmosphere warms up, hot gases rise higher. This creates a pull on the oceans of the Earth, so they also rise.
- C.
The moon's gravitational pull, though weaker than the Sun's, is closer. It attracts the Earth's core, making the planet bulge toward it and making oceans rise
- D.
The spinning of the earth makes ocean water move rhythmically, like water in a bucket while you're carrying it.
Correct Answer
C. The moon's gravitational pull, though weaker than the Sun's, is closer. It attracts the Earth's core, making the planet bulge toward it and making oceans riseExplanation
The moon's gravitational pull is closer to the Earth compared to the Sun's gravitational pull. This proximity allows the moon to have a significant effect on the Earth's tides. The moon's gravitational force attracts the Earth's core, causing the planet to bulge towards it. This bulging effect results in the rise of the oceans, creating tides. Although the Sun also exerts a gravitational pull on Earth, its impact on tides is relatively weaker due to its greater distance from the Earth.Rate this question:
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- 38.
If a star is a Red Giant or a Red Supergiant, which of the following might happen to it?
- A.
It could become a supernova
- B.
It could become a planetary nebula
- C.
It could become a white dwarf
- D.
It could become a neutron star
- E.
All of these are possible
Correct Answer
E. All of these are possibleExplanation
When a star reaches the Red Giant or Red Supergiant stage, it means that it has exhausted its nuclear fuel and is undergoing significant changes in its structure. At this point, several outcomes are possible. The star could undergo a supernova explosion, where it releases a tremendous amount of energy and material into space. Alternatively, it could shed its outer layers and form a planetary nebula. Another possibility is that the star collapses under its own gravity and becomes a white dwarf, a dense and compact object. Lastly, if the star is extremely massive, it could collapse further and become a neutron star. Therefore, all of these outcomes are possible for a Red Giant or Red Supergiant star.Rate this question:
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- 39.
Why are brown dwarf stars sometimes called a 'failed star'?
- A.
They are small and only emit infrared radiation (weak heat radiation)
- B.
They used to be something larger, but then exploded
- C.
They are not dense enough to begin nuclear fusion
- D.
They gave up on their goals and dreams
Correct Answer
A. They are small and only emit infrared radiation (weak heat radiation)Explanation
Brown dwarf stars are sometimes called a "failed star" because they are not dense enough to begin nuclear fusion. Nuclear fusion is the process by which stars generate energy, and without it, brown dwarfs cannot sustain the fusion reactions necessary to become a full-fledged star. Instead, they are small and only emit weak heat radiation in the form of infrared radiation. This lack of fusion sets them apart from true stars, earning them the moniker of "failed stars."Rate this question:
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- 40.
Why is the death of stars actually important to us on Earth, and in the universe in general?
- A.
Dying stars make room for new ones
- B.
The release of materials from the core provide the elements that make up living things
- C.
Too much energy in the universe is dangerous, so it must be reduced occasionally
- D.
The light from dying stars is what keeps plants alive on Earth
Correct Answer
B. The release of materials from the core provide the elements that make up living thingsExplanation
The death of stars is important because it releases materials from the core that provide the elements necessary for the formation of living things. These elements, such as carbon, oxygen, and nitrogen, are essential building blocks of life. Without the death of stars, these elements would not be dispersed into the universe, limiting the possibility of life existing elsewhere. Therefore, the death of stars plays a crucial role in the formation and sustenance of life in the universe.Rate this question:
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- 41.
Massive stars can go on with nuclear fusion for billions of years. Ultimately, after they run out of Hydrogen and Helium, they keep fusing atoms. Eventually, the oldest stars will have ____________ in their core.
- A.
Oxygen
- B.
Carbon
- C.
Neon
- D.
Iron
Correct Answer
D. IronExplanation
Massive stars can continue nuclear fusion for billions of years, even after they exhaust their hydrogen and helium fuel. As they continue fusing atoms, they progress through various fusion reactions, creating heavier elements. Eventually, the oldest stars will have iron in their core. Iron is the final element that can be produced through fusion in a star's core before it reaches the end of its life cycle. This is because fusion reactions involving iron do not release energy, causing the star to collapse under its own gravity, leading to a supernova explosion.Rate this question:
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- 42.
Which of the following is NOT true about stars?
- A.
They are terrestrial
- B.
They are luminous
- C.
They can move through a galaxy
- D.
They produce many different types of energy
Correct Answer
A. They are terrestrialExplanation
Stars are not terrestrial because they are celestial objects that exist in space. They are composed of hot gases and emit light and heat, making them luminous. Stars can move through a galaxy due to their gravitational interactions with other celestial bodies. Additionally, stars produce various types of energy, including light, heat, and radiation.Rate this question:
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- 43.
What is one of the reasons why astronomers track sun spots and solar flares?
- A.
They can help us forecast the weather here on Earth
- B.
They emit so much energy they can potentially disrupt and damage communications and technologies that we rely on here on Earth
- C.
They can help us predict comets and meteor showers
- D.
They might lead to a source of alternative energy on Earth
Correct Answer
B. They emit so much energy they can potentially disrupt and damage communications and technologies that we rely on here on EarthExplanation
Astronomers track sun spots and solar flares because they emit a significant amount of energy that has the potential to disrupt and damage communications and technologies on Earth. Monitoring these solar activities allows us to better understand and predict their impact, enabling us to take necessary precautions and safeguard our communication systems and technologies from potential disruptions.Rate this question:
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- 44.
What is the photosphere of the Sun?
- A.
The layer of the sun that emits light (photons)
- B.
The part of the sun that generates light particles (photons)
- C.
The massive outer region, extending for hundreds of thousands of kilometres
- D.
The layer of the sun that creates new elements
Correct Answer
A. The layer of the sun that emits light (pHotons)Explanation
The photosphere of the Sun refers to the layer of the Sun that emits light in the form of photons. It is the visible surface of the Sun that we see from Earth. This layer is responsible for the majority of the Sun's visible light and heat that reaches us. It is composed mainly of hydrogen gas and is the lowest layer of the Sun's atmosphere.Rate this question:
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- 45.
The colour of the sun that we see from earth mainly is the result of the sun's ___________________.
- A.
Corona
- B.
Core
- C.
Photosphere
- D.
Chromosphere
Correct Answer
D. ChromospHereExplanation
The color of the sun that we see from Earth is mainly the result of the sun's chromosphere. The chromosphere is the second of the three main layers of the sun's atmosphere, located above the photosphere. It is a thin layer that emits a reddish color due to the presence of hot gases and plasma. This layer is responsible for the beautiful red and orange hues that we observe during sunrise and sunset.Rate this question:
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- 46.
Which of the following do Planets and Stars have in common?
- A.
They orbit the sun
- B.
They are luminous
- C.
They can rotate on an axis
- D.
They both generate energy
Correct Answer
C. They can rotate on an axisExplanation
Both planets and stars have the ability to rotate on an axis. This rotation is responsible for the day and night cycle on planets, as well as the rotation of stars in the sky. It is a common characteristic shared by both celestial bodies.Rate this question:
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- 47.
Which of the following do Planets and Moons NOT have in common?
- A.
They are both reflective
- B.
They exhibit orbital motion or revolution
- C.
They can both have
- D.
They are both terrestrial
Correct Answer
C. They can both haveExplanation
The correct answer is "They can both have". This is because planets and moons do not have the ability to have something in common. The other options listed - being reflective, exhibiting orbital motion or revolution, and being terrestrial - are all characteristics that planets and moons share.Rate this question:
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- 48.
Which of the following would you find in our solar system's Asteroid Belt?
- A.
Ceres
- B.
Pluto
- C.
Charon
- D.
Eris
Correct Answer
A. CeresExplanation
Ceres is the correct answer because it is one of the largest objects in the asteroid belt, located between Mars and Jupiter. It is classified as a dwarf planet and is the only dwarf planet located in the inner solar system. Ceres is believed to be composed of rock and ice, and its discovery in 1801 marked the first identification of an asteroid.Rate this question:
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- 49.
Every once in a while astronomers observe objects in the night sky that look like stars but seem to have a trailing 'tail'. They are not stars, but are composed of rock and ice. What are these objects?
- A.
Dwarf planets
- B.
Meteors
- C.
Comets
- D.
Asteroids
Correct Answer
C. CometsExplanation
Comets are objects in the night sky that resemble stars but have a trailing tail. Comets are composed of rock and ice, which vaporize as they approach the Sun, creating a glowing tail. Unlike stars, comets are not permanent fixtures in the sky and can be observed periodically. Dwarf planets, meteors, and asteroids do not exhibit the characteristic tail of comets.Rate this question:
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- 50.
What was the name of the U.S. space missions that explored the moon in the 1960s?
- A.
Artemis
- B.
Apollo
- C.
Action
- D.
Alderaan
Correct Answer
B. ApolloExplanation
During the 1960s, the U.S. space missions that explored the moon were known as the Apollo missions. These missions were a series of manned spaceflights conducted by NASA with the goal of landing humans on the moon and bringing them safely back to Earth. The Apollo program successfully achieved this objective with the historic Apollo 11 mission in 1969, when astronauts Neil Armstrong and Buzz Aldrin became the first humans to set foot on the lunar surface. Therefore, the correct answer is Apollo.Rate this question:
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Mar 15, 2023Quiz Edited by
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Mar 07, 2020Quiz Created by
Astosich
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