Earth & Space Post-test
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- 1.
Which of the following lists the earth, sun, and moon in order from smallest to largest?
- A.
Earth, sun, moon
- B.
Moon, sun, earth
- C.
Sun, earth, moon
- D.
Moon, earth, sun
Correct Answer
D. Moon, earth, sunExplanation
The correct order from smallest to largest is moon, earth, sun. The moon is the smallest celestial body among the three, followed by the earth which is larger, and the sun being the largest.Rate this question:
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- 2.
What two things cause seasons on Earth?
- A.
Tilt of the axis and rotation
- B.
Tilt of the axis and orbit
- C.
Moon and sun placement
- D.
Rotation of earth on its axis and orbit around the sun
Correct Answer
B. Tilt of the axis and orbitExplanation
The tilt of the Earth's axis and its orbit around the sun are the two factors that cause seasons on Earth. The tilt of the axis causes different parts of the Earth to receive varying amounts of sunlight throughout the year, resulting in the change of seasons. As the Earth orbits around the sun, the angle at which sunlight reaches different regions of the Earth changes, further influencing the seasons.Rate this question:
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- 3.
Which of the following cause day and night on Earth?
- A.
Earth's orbit
- B.
The moon's orbit
- C.
Earth's rotation
- D.
The moon's rotation
Correct Answer
C. Earth's rotationExplanation
Earth's rotation is the correct answer because as the Earth spins on its axis, different parts of the planet are exposed to the Sun's light, creating day and night. This rotation takes approximately 24 hours to complete, resulting in the cycle of day and night that we experience on Earth. The other options, such as Earth's orbit or the moon's orbit and rotation, do not directly cause day and night on Earth.Rate this question:
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- 4.
Which is true about the orbit of the sun, earth, and moon?
- A.
The sun orbits around the earth and the moon orbits around the sun
- B.
The earth orbits around the sun and the moon orbits around the earth
- C.
The moon and earth orbit the sun, but not one another
- D.
The sun and earth orbit the moon
Correct Answer
B. The earth orbits around the sun and the moon orbits around the earthExplanation
The explanation for the given correct answer is that the earth orbits around the sun and the moon orbits around the earth. This is a well-established fact in astronomy. The earth revolves around the sun in an elliptical orbit, taking approximately 365 days to complete one orbit. Meanwhile, the moon revolves around the earth in a similar elliptical orbit, taking about 27.3 days to complete one orbit. This arrangement of orbits is what causes phenomena like day and night, seasons, and lunar phases.Rate this question:
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- 5.
What causes the moon to appear to change shape?
- A.
The moon's orbit around the Earth causes it to look different
- B.
The moon's rotation around the sun changes
- C.
The Earth blocks some of the light
- D.
The Earth rotates to make it look differently
Correct Answer
A. The moon's orbit around the Earth causes it to look differentExplanation
The moon's appearance changes because of its orbit around the Earth. As the moon moves in its orbit, different portions of its illuminated surface are visible from Earth, resulting in different phases such as full moon, crescent, or half moon. This change in perspective creates the illusion of the moon changing shape.Rate this question:
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- 6.
A lunar eclipse is_________________.
- A.
When the moon is hidden from sight because of the Earth's shadow.
- B.
When the sun is hidden behind moon
- C.
When the Earth is hidden behind the moon
- D.
When the moon is close to the sun
Correct Answer
A. When the moon is hidden from sight because of the Earth's shadow.Explanation
A lunar eclipse occurs when the moon is hidden from sight because of the Earth's shadow. During a lunar eclipse, the Earth comes between the sun and the moon, causing the moon to pass through the Earth's shadow. This results in the moon appearing dark or reddish in color during the eclipse. The moon does not block the sun during a lunar eclipse, as it does in a solar eclipse.Rate this question:
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- 7.
___________ is when the side of the moon facing earth is completely lit up and _______________ is when it is completely dark.
- A.
New moon; full moon
- B.
1st moon; last moon
- C.
Full moon; new moon
- D.
Crescent moon; gibbous moon
Correct Answer
C. Full moon; new moonExplanation
The full moon occurs when the side of the moon facing the Earth is completely lit up, resulting in a fully illuminated view from Earth. On the other hand, the new moon happens when the side of the moon facing the Earth is completely dark, as it is not receiving any direct sunlight. The new moon phase marks the beginning of a new lunar cycle.Rate this question:
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- 8.
Which of the following is true about gravity?
- A.
Gravity pulls things down.
- B.
Gravity holds things up.
- C.
Gravity pulls things to the center.
- D.
All of the above.
Correct Answer
C. Gravity pulls things to the center.Explanation
Gravity pulls things to the center because it is a force that attracts all objects towards each other. This force is proportional to the mass of the objects and inversely proportional to the square of the distance between them. Therefore, gravity pulls objects towards the center of the Earth or towards the center of any other massive object.Rate this question:
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- 9.
The sun's gravity does which of the following?
- A.
Holds the planets in orbit
- B.
Holds the moons in orbit
- C.
Both A & B
- D.
Neither A or B
Correct Answer
C. Both A & BExplanation
The sun's gravity has the ability to hold both planets and moons in orbit. Planets and moons are constantly pulled towards the sun due to its strong gravitational force, which keeps them in their respective orbits. Therefore, both options A and B are correct.Rate this question:
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- 10.
What holds the moon in orbit around the Earth?
- A.
The sun's gravity
- B.
The moon's gravity
- C.
The Earth's gravity
- D.
The universal gravity
Correct Answer
C. The Earth's gravityExplanation
The Earth's gravity holds the moon in orbit around the Earth. Gravity is the force of attraction between two objects with mass, and the larger the mass, the stronger the gravitational pull. Since the Earth is much larger and more massive than the moon, its gravitational force is able to keep the moon in orbit. This force keeps the moon constantly moving around the Earth in a circular or elliptical path, balancing the moon's forward motion with the Earth's gravitational pull.Rate this question:
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- 11.
Which of the following could happen if the sun had no gravitational pull?
- A.
The planets would continue orbiting with no changes
- B.
The planets would no longer orbit the sun and would begin moving throughout the solar system
- C.
The planets would continue orbiting but at a faster rate
- D.
There is no way to predict what might happen
Correct Answer
B. The planets would no longer orbit the sun and would begin moving throughout the solar systemExplanation
If the sun had no gravitational pull, the planets would no longer be held in their orbits around the sun. Without the sun's gravitational force, the planets would be free to move throughout the solar system in unpredictable paths.Rate this question:
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- 12.
Where does the moon get it's light?
- A.
It creates its own light
- B.
It receives light reflected off of the Earth
- C.
It reflects lights from the sun
- D.
None of the above
Correct Answer
C. It reflects lights from the sunExplanation
The moon gets its light by reflecting light from the sun. This is why we see different phases of the moon as it orbits the Earth. When the moon is between the Earth and the sun, we see a new moon because the side of the moon facing us is not receiving any sunlight. As the moon moves in its orbit, we see different amounts of the sunlit side, resulting in the different phases of the moon. Therefore, the correct answer is that the moon reflects light from the sun.Rate this question:
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