Astronomy Quiz For 9th-grade
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Astronomy is the study of celestial objects such as planets, comets, stars, etc. Are you in ninth grade and have just read astronomy and want to review what you have already learned? These 9th-grade astronomy questions and facts will help you through the process; give them a shot and keep an eye out for others like them.
From identifying planets and understanding their unique features to exploring the life cycles of stars, this quiz promises an engaging exploration of introductory astronomy concepts. Challenge yourself with inquiries on galaxies, the electromagnetic spectrum, and the tools astronomers use to unravel the Read moremysteries of space.
- 1.
What is the Big Bang Theory?
- A.
A theory suggesting our Universe came to be throughout a massive explosion, expanding ever-outwards after being confined to a single atom for billions of years.
- B.
A TV show
- C.
A Theory suggesting that Earth was created in a big explosion about 3 billion years ago.
Correct Answer
A. A theory suggesting our Universe came to be throughout a massive explosion, expanding ever-outwards after being confined to a single atom for billions of years.Explanation
The Big Bang Theory is a scientific theory that proposes that the universe originated from a massive explosion. According to this theory, the entire universe was initially confined to a single atom-like state for billions of years, and then it underwent a rapid expansion, continuously expanding outward. This theory provides an explanation for the origin and evolution of the universe as we know it today.Rate this question:
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- 2.
The Moon is a Satelite.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The Moon is indeed a satellite. It is the Earth's only natural satellite and it orbits around the Earth. Satellites are objects that revolve around a larger celestial body, and the Moon fits this definition as it revolves around the Earth.Rate this question:
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- 3.
There are three types of galaxies: Spiral, Elliptical, and
Correct Answer
Irregular , irregularExplanation
Galaxies are generally classified into three main types: Spiral, Elliptical, and Irregular. Spiral galaxies, like our Milky Way, have a flat, rotating disk with spiral arms. Elliptical galaxies have a more rounded shape and lack the defined structure of spirals. Irregular galaxies do not fit into either of these categories and have no specific shape, often appearing chaotic in structure. These three types encompass the majority of observed galaxies.Rate this question:
- 4.
Our Universe consists of only about 4% atoms. How much of it is Dark Matter and Dark Energy?
- A.
80% Dark Matter, 16% Dark Energy
- B.
68% Dark Energy, 27% Dark Matter
- C.
94% Dark Energy, 2% Dark Matter
- D.
What is Dark Matter and Energy?
Correct Answer
B. 68% Dark Energy, 27% Dark MatterExplanation
Approximately 68% of the cosmos is composed of dark energy, while dark matter constitutes around 27%. The remaining portion, which encompasses everything on Earth and all observable matter using our instruments, amounts to less than 5% of the entire universe.Rate this question:
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- 5.
Units of Distance in Space is measured in
- A.
Kilowatt Hours (KWH)
- B.
Light Years (LY)
- C.
Gigameters (GM)
Correct Answer
B. Light Years (LY)Explanation
Distance in space is measured in light years (LY) because it is a unit that represents the distance that light travels in one year. Since light travels at a constant speed, using light years as a unit allows scientists to accurately measure vast distances in space. Kilowatt hours (KWH) and gigameters (GM) are not appropriate units for measuring distance in space as they are used for measuring energy and length on Earth, respectively.Rate this question:
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- 6.
Nuclear Fusion occurs during the Protostar phase in a star's life.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Nuclear fusion does not occur during the Protostar phase in a star's life. The Protostar phase is the early stage of a star's formation, where gravitational collapse causes the core temperature to rise. Nuclear fusion, which is the process of combining atomic nuclei to release energy, occurs in the main sequence phase of a star's life, after the Protostar phase. This is when the star has reached a stable state and is fusing hydrogen into helium in its core. Therefore, the statement is false.Rate this question:
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- 7.
Check all of the following star life phases that can occur during a massive star's life (100x the sun) , after the supernova.
- A.
Black Hole
- B.
White Dwarf
- C.
Red Supergiant
- D.
Neutron Star
- E.
Big Bang
Correct Answer(s)
A. Black Hole
D. Neutron StarExplanation
During a massive star's life, after a supernova, two possible star life phases can occur: Black Hole and Neutron Star. A Black Hole is formed when the core of a massive star collapses under its own gravity, creating a region of spacetime with extremely strong gravitational forces. A Neutron Star is formed when the core of a massive star collapses, but not enough to form a black hole, resulting in a dense and compact star composed mainly of neutrons. The other options listed, such as White Dwarf, Red Supergiant, and Big Bang, do not occur after a supernova in the life of a massive star.Rate this question:
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- 8.
A galaxy is a collection of gas, dust, stars, and planets held together by
Correct Answer(s)
Gravity, Gravitational forceExplanation
A galaxy is a vast system that consists of various components such as gas, dust, stars, and planets. These components are held together by the force of gravity. Gravity is a fundamental force of nature that attracts objects towards each other. In the case of a galaxy, the gravitational force between its components keeps them bound together, preventing them from drifting apart. Therefore, gravity is the force responsible for holding a galaxy intact.Rate this question:
- 9.
Select any of the following that are part of the Electromagnetic Spectrum
- A.
Gamma Rays
- B.
String Rays
- C.
Ultraviolet Light
- D.
Infrared Light
- E.
Hypnotic Light
- F.
Visible Light
- G.
Radio Waves
- H.
Microwaves
Correct Answer(s)
A. Gamma Rays
C. Ultraviolet Light
D. Infrared Light
F. Visible Light
G. Radio Waves
H. MicrowavesExplanation
The correct answer includes Gamma Rays, Ultraviolet Light, Infrared Light, Visible Light, Radio Waves, and Microwaves. These are all part of the electromagnetic spectrum, which is a range of wavelengths or frequencies of electromagnetic radiation. Gamma rays have the shortest wavelength and highest frequency, while radio waves have the longest wavelength and lowest frequency. Ultraviolet light, infrared light, and visible light fall in between these extremes.Rate this question:
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- 10.
It is believed that this type of galaxy is often the oldest and biggest.
- A.
Irregular
- B.
Spiral
- C.
Elliptical
- D.
Milky Way
Correct Answer
C. EllipticalExplanation
Elliptical galaxies are often considered to be the oldest and biggest type of galaxy. They are characterized by their smooth, oval-shaped appearance and lack of distinct spiral arms. These galaxies are believed to have formed early in the universe's history through mergers and interactions with other galaxies, resulting in their elliptical shape. The absence of ongoing star formation in elliptical galaxies further supports the idea that they are older compared to other types of galaxies.Rate this question:
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- 11.
When an object is moving closer to us, it appears red-shifted in colour. When an object is moving away from us, it appears blue-shifted in colour.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
When an object is moving closer to us, it appears blue-shifted in color due to the Doppler effect. This means that the wavelengths of the light emitted by the object are compressed, causing a shift towards shorter wavelengths, which our eyes perceive as a shift towards the blue end of the spectrum. Conversely, when an object is moving away from us, it appears red-shifted in color because the wavelengths of the light are stretched, resulting in a shift towards longer wavelengths, which our eyes perceive as a shift towards the red end of the spectrum. Therefore, the given statement is false.Rate this question:
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- 12.
Meteors, Meteorites, and Meteriods are all the same thing.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Meteors, meteorites, and meteoroids are not the same thing. A meteor is a streak of light that is produced when a meteoroid enters the Earth's atmosphere and burns up. A meteorite is a meteoroid that survives its passage through the Earth's atmosphere and lands on the Earth's surface. A meteoroid is a small rocky or metallic object that orbits the Sun. Therefore, meteors, meteorites, and meteoroids are related but refer to different stages of the same phenomenon.Rate this question:
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- 13.
Which of the following phenomena is responsible for the fact that we always see the same side of the Moon from Earth?
- A.
Lunar eclipse
- B.
Tidal locking
- C.
Precession
- D.
Retrograde motion
Correct Answer
B. Tidal lockingExplanation
The phenomenon known as tidal locking is responsible for the Moon always showing the same face to Earth. This occurs because the Moon's rotation period (the time it takes to rotate once on its axis) is equal to its orbital period (the time it takes to orbit the Earth). As a result, one hemisphere of the Moon is always facing Earth. A lunar eclipse (A) occurs when the Earth comes between the Sun and the Moon, precession (C) is the slow change in the orientation of a planet's axis, and retrograde motion (D) refers to the apparent backward motion of planets from Earth's perspective.Rate this question:
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