AnswersAZ-Earth and Space Science A SC301The Solar System

Unit 9 Test Answers

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Why are there two high tides a day about 12 hours apart from each other?

A
Earth revolves around the Sun once during that time.
B
Earth rotates entirely on its axis once during that time.
C
The moon revolves around Earth once during that time.
D
The moon’s orbit is in line with Earth’s orbit twice a day.
22
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The image shown is an illustration of Kepler’s second law.

Question illustration
A
The gravitational force at W is less than the gravitational force at Y.
B
The time needed to travel from W to X is the same as the time needed to travel from Y to Z.
C
The gravitational force at W is the same as the gravitational force at Y.
D
The time needed to travel from W to X is greater than the time needed to travel from Y to Z.
23

What did Johannes Kepler contribute to the study of planets?

A
He formulated the universal law of gravitation.
B
He identified the first moons of Jupiter.
C
He collected detailed data that led to the proposal of the heliocentric model.
D
He provided mathematical support for the heliocentric model.
24

Hakeem wants to explain why only one side of the moon is visible from Earth. Which comparison would provide the best support?

A
the orbital period of Earth with the rotational period of the moon
B
the orbital period of the moon with the rotational period of the moon
C
the orbital period of the moon with the rotational period of the Earth
D
the orbital period of Earth with the orbital period of the moon
25

The diagram shows Ned’s movement as he left his house and traveled to different places throughout the day.Which reference point should be used to find out how far Ned traveled when he went from the pet store to the swimming pool?

Question illustration
A
V
B
W
C
X
D
Z
26

Which statement is supported by Kepler’s laws?

A
The closer a planet is to the Sun, the faster it moves.
B
The farther a planet is from the Sun, the faster it moves.
C
As a planet moves away from the Sun, its gravitational force increases.
D
As a planet moves away from the Sun, its gravitational force remains the same.
27

Duy models the Moon and Earth by swinging a yo-yo on a string around his hand. What does each part of Duy’s model represent?

A
Duy’s hand represents the Moon, the yo-yo represents Earth, and the string represents gravity.
B
Duy’s hand represents Earth, the yo-yo represents the Moon, and the string represents gravity.
C
Duy’s hand represents the Moon, the yo-yo represents Earth, and the string represents one month.
D
Duy’s hand represents Earth, the yo-yo represents the Moon, and the string represents one month.
28

Stella drew the image shown to represent the Moon’s motion.

Question illustration
A
The Moon does not have an orbit.
B
The Moon orbits Earth, not the Sun.
C
The positions of the Sun and the Moon should be switched.
D
The Moon should be shown rotating in addition to orbiting the Sun.
29

What must be included when describing the displacement of an object?

A
measurement and direction
B
direction and speed
C
total distance and position
D
speed and total distance

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