Solar System Unit Test Review

Which of these is a force that causes objects to pull toward each other?

• Apparent Motion

• Gravity

Which statement best explains why the northern and southern hemisphere have different seasons?

• Earth's tilt on its axis as it revolves around the sun causes energy from the sun to strike on one hemisphere more or less directly than the other.

• Earth's revolution and rotation around the sun brings certain parts of Earth closer to the sun.

Eric observed the moon each night for four weeks. He took pictures of how the moon appeared each night. Here are two of Eric's pictures.

Which statement explain why the moon goes through phases over the course of a month?

• Gravity between Earth and the moon cause the moon's phases.

• The revolution of the moon around Earth causes the moon's phases.

Juan got up one morning and observed the moon on the western horizon. In the evening, he saw the moon rising in the east.

What kind of motion did Juan observe?

• The apparent motion of the moon.

• The apparent motion of the sun.

What factors produce Earth's seasons?

• Earth's rotation and gravity

• Earth's revolution around the sun and the tilt of its axis

What is one factor that affects the strength of gravity's pull on an object?

• The apparent motion of an object across the sky

• The distance between two objects pulling on each other

Which statement about the sun and other stars is true?

• The sun is much closer to Earth than other stars so its brightness blocks the light from the other starts during daylight hours.

• The sun is much closer to Earth than the other stars, but the other stars are visible most daylight hours.

A pencil and a crumpled sheet of paper are dropped from one foot above the ground at the same time.

What can you conclude will happen?

If you are not sure, try it and see what happens.

• The pencil will hit the floor before the paper.

• The paper and pencil will hit the floor at the same time.

About how long does it take for Earth to complete one rotation?

• 1 hour

• 24 hours

Samantha watched the video below of the shadow of a pole.

What causes the length of the shadow to change?

https://youtu.be/yJo674TYGMs

• Earth's rotation

• The moon's rotation