Earth, Moon, Sun Test Review

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• 1.

Which object in space produces its own light?

• A.

Moon

• B.

Star

• C.

Planet

• D.

Asteroid

B. Star
Explanation
Stars are objects in space that produce their own light through a process called nuclear fusion. In the core of a star, hydrogen atoms combine to form helium, releasing a tremendous amount of energy in the form of light and heat. This process, known as nuclear fusion, is what powers stars and allows them to emit their own light. While other objects in space, such as the Moon, planets, and asteroids, can reflect light from a nearby star, they do not produce their own light.

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• 2.

About how long does one rotation of the Earth take?

• A.

24 hours

• B.

365 Days

• C.

12 hours

• D.

30 days

A. 24 hours
Explanation
One rotation of the Earth takes approximately 24 hours. This is because the Earth rotates on its axis once every 24 hours, causing day and night to occur. This rotation is what gives us the concept of a day, with 12 hours of daylight and 12 hours of darkness. The 24-hour rotation period is also the basis for our timekeeping systems, with each day divided into 24 equal hours.

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• 3.

About how long does one revolution of the Earth take?

• A.

24 hours

• B.

365 days

• C.

12 hours

• D.

30 days

B. 365 days
Explanation
One revolution of the Earth refers to the time it takes for the Earth to complete one orbit around the Sun. This period is known as a year and it takes approximately 365 days for the Earth to complete one revolution.

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• 4.

How many stars do we have in our solar system?

• A.

1,000,000

• B.

1,000

• C.

1

• D.

100

C. 1
Explanation
Our solar system has only one star, which is the Sun. The Sun is a G-type main-sequence star, and it is the center of our solar system. It provides heat, light, and energy to all the planets and other celestial bodies in our solar system.

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• 5.

Which is NOT true about gravity?

• A.

It is the attraction among all objects in the universe.

• B.

It causes an object on Earth to have weight.

• C.

It prevents asteroids from crashing into Earth.

• D.

It causes the sun to pull the Earth and keep it in its orbit around the sun.

C. It prevents asteroids from crashing into Earth.
Explanation
Gravity is the force of attraction between all objects in the universe, so the statement "It is the attraction among all objects in the universe" is true. Gravity causes an object on Earth to have weight, so the statement "It causes an object on Earth to have weight" is also true. Gravity is responsible for keeping the Earth in its orbit around the sun, so the statement "It causes the sun to pull the Earth and keep it in its orbit around the sun" is true. However, gravity does not prevent asteroids from crashing into Earth, as there have been instances of asteroid impacts throughout history.

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• 6.

The closer a planet is to the Sun the _____________________ it will be.

• A.

Bigger

• B.

Colder

• C.

Hotter

• D.

Smaller

C. Hotter
Explanation
The closer a planet is to the Sun, the hotter it will be because the Sun emits heat and radiation. When a planet is closer to the Sun, it receives more direct sunlight and absorbs more heat energy, leading to higher temperatures. This is evident in our own solar system, where the innermost planets like Mercury and Venus experience extremely high temperatures due to their proximity to the Sun.

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• 7.

Which is NOT true about satellites?

• A.

The Earth has one artificial satelite.

• B.

It is an object that orbits another object in space.

• C.

The Earth is a satellite of the sun.

• D.

The Earth has one natural satelite.

A. The Earth has one artificial satelite.
Explanation
The statement "The Earth has one artificial satellite" is not true because the Earth actually has thousands of artificial satellites. These satellites are man-made objects that orbit the Earth and serve various purposes such as communication, weather monitoring, and scientific research.

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• 8.

Which is NOT true about the planets in our solar system.

• A.

There are 8 planets and 1 dwarf planet.

• B.

The sun is the only star in our solar system.

• C.

Each planet has 1 moon.

• D.

The bigger planets are closer to the sun.

C. Each planet has 1 moon.
Explanation
The statement "Each planet has 1 moon" is not true because not all planets in our solar system have only one moon. For example, Jupiter has 79 known moons, Saturn has 82, and Uranus has 27. Some planets have no moons, like Mercury and Venus, while others have a varying number of moons. Therefore, the statement is incorrect.

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• 9.

There are eight phases in our moon cycle. Choose the correct order of this cycle.

• A.

New Moon, Waning Crescent, Third Quarter, Waning Gibbous, Full Moon, Waxing Gibbous, First Quarter, and Waxing Crescent.

• B.

New Moon, Waxing Crescent, Third Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, First Quarter, and Waning Crescent.

• C.

Full Moon, Waning Crescent, First Quarter, Waning Gibbous, Full Moon, Waxing Gibbous, Third Quarter, and Waxing Crescent.

• D.

New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, and Waning Crescent

D. New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, and Waning Crescent
Explanation
The correct order of the moon cycle is New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, and Waning Crescent. This sequence represents the different phases of the moon as it goes through its monthly cycle. The New Moon is when the moon is not visible, followed by the Waxing Crescent where a small sliver of the moon becomes visible. The First Quarter is when half of the moon is visible, followed by the Waxing Gibbous where more than half of the moon is visible. The Full Moon is when the entire face of the moon is visible, followed by the Waning Gibbous where the visible portion starts to decrease. The Third Quarter is when half of the moon is visible again, followed by the Waning Crescent where only a small sliver is visible before the cycle starts again with the New Moon.

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• 10.

A solar eclipse may occur when ______________________.

• A.

There is a full moon

• B.

The moon is between the Earth and the sun

• C.

The Earth casts a shadow on the Earth.

• D.

The Earth is between the moon and the sun

B. The moon is between the Earth and the sun
Explanation
A solar eclipse occurs when the moon is positioned between the Earth and the sun. This alignment causes the moon to block the sunlight from reaching certain parts of the Earth, resulting in a temporary darkening of the sky. The moon's shadow falls on the Earth during a solar eclipse, creating a visually striking phenomenon.

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• 11.

A lunar eclipse may occure when ___________________.

• A.

The moon is between the Earth and the sun

• B.

There is a New Moon

• C.

The Earth is between the moon and the sun

• D.

The sun casts a shadow over the Earth

C. The Earth is between the moon and the sun
Explanation
A lunar eclipse occurs when the Earth is between the moon and the sun. During this phenomenon, the Earth blocks the sunlight from reaching the moon, causing it to appear dark or reddish in color. This alignment of the Earth, moon, and sun creates a shadow that is cast over the moon, resulting in a lunar eclipse.

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• 12.

A revolution is _______________.

• A.

One complete spin of Earth on its axis

• B.

One complete spin of the sun on its axis

• C.

One complete orbit around the sun

• D.

One complete orbit around the moon

C. One complete orbit around the sun
Explanation
A revolution refers to one complete orbit around the sun. This means that an object, such as a planet, completes a full circle around the sun. It is different from a rotation, which refers to the spin of an object on its axis. In the context of the question, a revolution specifically refers to the movement of Earth or any other celestial body around the sun.

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• 13.

A rotation is ___________________.

• A.

One complete spin of Earth on its axis

• B.

One complete spin of the sun on its axis

• C.

One complete orbit around the sun

• D.

One complete orbit around the moon

A. One complete spin of Earth on its axis
Explanation
A rotation refers to one complete spin of Earth on its axis. This means that Earth completes a full rotation, or a 360-degree turn, around its axis. This rotation takes approximately 24 hours to complete and is responsible for the cycle of day and night on Earth.

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• 14.

Which of these things happen because the Earth is tilted?

• A.

Seasons

• B.

Tides

• C.

Oceans

• D.

Rainfall

A. Seasons
Explanation
The Earth is tilted on its axis, which causes the change in seasons. As the Earth orbits the sun, different parts of the planet receive varying amounts of sunlight throughout the year. When one hemisphere is tilted towards the sun, it experiences summer, while the other hemisphere is tilted away and experiences winter. The tilt also affects the length of daylight hours and the angle at which sunlight reaches the Earth's surface, influencing temperature and weather patterns. Tides, oceans, and rainfall, on the other hand, are influenced by other factors such as the moon's gravitational pull and atmospheric conditions.

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• 15.

True or false? The force of gravity between the Earth and the moon causes the tides on Earth.

• A.

True

• B.

False

A. True
Explanation
The force of gravity between the Earth and the Moon causes the tides on Earth. This is because the Moon's gravitational pull creates a tidal bulge on the side of the Earth facing the Moon, as well as a second tidal bulge on the opposite side. As the Earth rotates, these tidal bulges cause the water to rise and fall, creating the phenomenon of tides. Therefore, the statement is true.

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• Sep 19, 2023
Quiz Edited by
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• Jun 17, 2010
Quiz Created by
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