1.
The pereodic rise and fall of the oceans's surface is the ____________________.
Correct Answer
C. Tide
Explanation
The periodic rise and fall of the ocean's surface is known as a tide. Tides are caused by the gravitational pull of the moon and the sun on the Earth's oceans. As the moon orbits around the Earth, it creates a gravitational force that causes the water to bulge towards it, creating a high tide. When the moon is on the opposite side of the Earth, it creates a low tide. This cycle of high and low tides occurs twice a day and is responsible for the movement of ocean currents and the distribution of marine life.
2.
The appearance and shape of the moon as you see it from Earth is called a ______________________.
Correct Answer
D. pHase
Explanation
The appearance and shape of the moon as seen from Earth is called a phase. The moon goes through different phases as it orbits around the Earth, which are determined by the relative positions of the Earth, moon, and sun. These phases include new moon, crescent moon, half moon, and full moon. The changing phases of the moon are a result of the sunlight reflecting off different portions of the moon's surface as it moves in its orbit.
3.
When the Moon moves into the Earth's shadow,a _____________________ occurs.
Correct Answer
B. Lunar eclipse
Explanation
When the Moon moves into the Earth's shadow, a lunar eclipse occurs. During a lunar eclipse, the Earth blocks the sunlight from reaching the Moon, causing the Moon to appear dark or reddish in color. This phenomenon happens when the Moon, Earth, and Sun align in a straight line, with the Earth in the middle. Unlike a solar eclipse, which occurs when the Moon blocks the sunlight from reaching the Earth, a lunar eclipse is visible from anywhere on the night side of the Earth where the Moon is above the horizon.
4.
When the Moon passes directly between the sun and Earth,a _________________heppens.
Correct Answer
B. Solar eclipse
Explanation
When the Moon passes directly between the sun and Earth, a solar eclipse happens. During a solar eclipse, the Moon blocks the sunlight from reaching the Earth, casting a shadow on the Earth's surface. This occurs when the Moon is in its new moon phase and its orbit aligns with the Earth and the Sun. The Moon appears to cover the Sun partially or completely, creating a temporary darkening of the sky.
5.
The time from one phase of the Moon until the next time the Moon reaches the same phase is _______________ .
Correct Answer
A. 1 month
Explanation
The time from one phase of the Moon until the next time the Moon reaches the same phase is 1 month. This is because it takes approximately 29.5 days for the Moon to complete one orbit around the Earth and go through all its phases. Therefore, it takes about a month for the Moon to go from a new moon phase to a full moon phase and then back to a new moon phase again.
6.
As _______________ rotates,the tides move around the planet.
Correct Answer
A. Earth
Explanation
As the earth rotates, the gravitational force between the earth and the moon causes the tides to move around the planet. The gravitational pull of the moon creates a bulge of water on the side of the earth facing the moon, creating a high tide. As the earth rotates, different parts of the planet experience this gravitational pull, causing the tides to move around the earth. The sun also has a smaller influence on the tides, but the earth's rotation is the primary factor.
7.
The phases of the moon are caused by the revolution of the Moon and the Earth.
Correct Answer
A. True
Explanation
The phases of the moon are caused by the revolution of the Moon and the Earth. As the Moon orbits around the Earth, different portions of its illuminated surface become visible from Earth, resulting in the different phases of the moon. The angle at which the Sun's light hits the Moon and the relative positions of the Moon, Earth, and Sun determine the specific phase observed. This phenomenon is a result of the interaction between the Moon and the Earth during their revolution.
8.
What causes the light that shines from the Moon come from?
Correct Answer
A. Light from the Sun that reflects off the Moon's surface
Explanation
The light that shines from the Moon comes from the Sun. The Moon does not produce its own light, but rather reflects the sunlight that falls on its surface. This reflected sunlight is what causes the Moon to appear bright in the night sky.
9.
This galaxy includes the _____________________, which has the Sun at its center.
Correct Answer
C. Solar system
Explanation
This galaxy includes the solar system, which has the Sun at its center. The solar system consists of the Sun, planets, and other celestial bodies that orbit around it. The Sun is the central star of the solar system, and all the planets, including Earth, revolve around it. Therefore, the correct answer is solar system.
10.
The solar system also has rocky asteroids and icy ______________________that orbit the Sun.
Correct Answer
A. Comets
Explanation
The solar system is composed of various celestial bodies that orbit the Sun, including planets, rocky asteroids, and icy comets. Comets are made up of ice, dust, and rocky material and have long, elliptical orbits around the Sun. They often develop a glowing coma and a tail when they approach the Sun due to the heat causing the ice to vaporize. Therefore, the correct answer is comets.
11.
The force of attraction between any two objects is ______________.
Correct Answer
B. Gravity
Explanation
Gravity is the force of attraction between any two objects. It is a natural phenomenon by which all things with mass or energy are brought towards one another. This force is responsible for keeping objects grounded on the Earth's surface, causing objects to fall when dropped, and governing the motion of celestial bodies in space.
12.
The strength of gravity increases as the _______________ of objects increases and decreases as the distance between objects increases.
Correct Answer
D. Mass
Explanation
The strength of gravity is directly proportional to the mass of objects. This means that as the mass of objects increases, the strength of gravity also increases. On the other hand, the strength of gravity decreases as the distance between objects increases. Therefore, the correct answer is "mass" as it accurately describes the relationship between gravity and the mass of objects.
13.
A path that one object takes as it moves around another object is its ___________________________.
Correct Answer
A. Orbit
Explanation
An orbit is the path that one object takes as it moves around another object. It is commonly used to describe the path of planets around the sun or satellites around the Earth. The term "orbit" refers to the curved trajectory that an object follows due to the gravitational pull of another object.
14.
Moving objects have the tendency to keep moving in a straight line; this is called __________________.
Correct Answer
C. Inertia
Explanation
Inertia is the tendency of moving objects to keep moving in a straight line. It is the resistance of an object to changes in its motion. This means that if an object is already in motion, it will continue moving in the same direction and at the same speed unless acted upon by an external force.
15.
Every year, Earth makes one complete trip, or ______________, around the Sun.
Correct Answer
B. Revolution
Explanation
The word "revolution" is the correct answer because it accurately describes the Earth's movement around the Sun. A revolution refers to a complete trip or orbit around a central point, in this case, the Sun. This movement takes approximately 365 days to complete, resulting in the changing of seasons and the passage of a year on Earth.
16.
Sunlight strikes Earth differently at different times of year because Earth’s axis is _____________.
Correct Answer
D. Tilted
Explanation
The correct answer is "tilted." Earth's axis is tilted, which causes sunlight to strike the Earth differently at different times of the year. This tilt is responsible for the changing seasons and the variation in daylight hours throughout the year.
17.
The changes in the angle of sunlight on Earth’s surface cause the _________________.
Correct Answer
B. Seasons
Explanation
The changes in the angle of sunlight on Earth's surface cause the seasons. As the Earth orbits around the Sun, the tilt of its axis causes different parts of the Earth to receive varying amounts of sunlight throughout the year. When a particular hemisphere is tilted towards the Sun, it experiences summer, while the opposite hemisphere experiences winter. As the Earth continues its orbit, the angle of sunlight changes, leading to the transition of seasons.
18.
Rocks striking the Moon over billions of years have formed many _________________.
Correct Answer
A. Craters
Explanation
Over billions of years, rocks striking the Moon have created many craters.
19.
When the Moon moves into Earth’s shadow, a ___________________occurs.
Correct Answer
A. Lunar eclipse
Explanation
A lunar eclipse occurs when the Moon moves into Earth's shadow. During a lunar eclipse, the Earth is positioned between the Sun and the Moon, causing the Moon to pass through the Earth's shadow. This results in the Moon appearing darkened or reddish in color. A solar eclipse, on the other hand, occurs when the Moon moves between the Sun and the Earth, blocking the Sun's light and casting a shadow on the Earth. Therefore, the correct answer is lunar eclipse.
20.
The orbiting Hubble Space Telescope “sees” objects more clearly than Earth-based telescopes because Earth’s _____________ does not change Hubble’s view.
Correct Answer
B. AtmospHere
Explanation
The correct answer is atmosphere. Earth's atmosphere can distort and blur the images captured by ground-based telescopes due to factors such as air turbulence, atmospheric pressure, and temperature variations. However, the Hubble Space Telescope is located outside Earth's atmosphere, allowing it to capture clearer and sharper images of celestial objects without the interference of atmospheric conditions.
21.
Radio telescopes are giant dishes on Earth’s surface that gather __________________waves from objects in space.
Correct Answer
D. Radio
Explanation
Radio telescopes are giant dishes on Earth's surface that gather radio waves from objects in space. These telescopes are specifically designed to detect and collect radio waves, which are a form of electromagnetic radiation. By capturing these radio waves, scientists can study and analyze the signals emitted by celestial objects such as stars, galaxies, and quasars. The use of radio telescopes has greatly contributed to our understanding of the universe and has allowed us to discover and study various astronomical phenomena.
22.
The solar system’s moons are natural ____________________,but artificial satellites orbit Earth to gather weather data
and help people communicate.
Correct Answer
B. Satellites
Explanation
The correct answer is "satellites". The explanation is that the solar system's moons are natural satellites, meaning they are celestial bodies that orbit around a planet. On the other hand, artificial satellites are man-made objects that are launched into space to perform various tasks, such as gathering weather data and facilitating communication on Earth.
23.
Most of the solar system’s _______________________orbit the Sun in a belt between Mars and Jupiter.
asteroids
Correct Answer
B. Asteroids
Explanation
Most of the solar system's asteroids orbit the Sun in a belt between Mars and Jupiter. This statement is true because the asteroid belt, located between the orbits of Mars and Jupiter, is a region where most of the solar system's asteroids are found. Asteroids are rocky objects that vary in size and shape and are remnants from the early formation of the solar system.
24.
Balls of ice, dust, and rock in elongated elliptical orbits comets around the Sun are __________________
Correct Answer
A. Comets
Explanation
Comets are balls of ice, dust, and rock that orbit the Sun in elongated elliptical paths. This distinguishes them from asteroids, which are rocky objects that orbit the Sun in more circular or elliptical paths. The presence of ice in comets causes them to have a glowing coma and tail when they approach the Sun, due to the heat causing the ice to vaporize and release gas and dust. Therefore, the correct answer is comets.