Lesson 1- Earth's Movement

Why does the sun seem to change position in the sky?

• Earth's rotation

• Earth's orbit

• The sun's rotation

• the sun's orbit

What would you expect to happen if Earth did not tilt on its axis?

• There would be darkness all the time.

• There would be shorter daylight hours in the winter.

• There would be similar hours of daylight and darkness all year.

• There would be longer hours of daylight in the summer.

What is a clue that Earth is moving?

• The stars move around Earth.

• You can feel Earth's movement.

• The seasons change during the year.

• You are moving right along with Earth.

What keeps Earth revolving around the sun?

• The force of gravity

• the pull of the moon

• The tilt of Earth's axis

• The rotation of Earth

The picture shows the moon between Earth and the sun. Why are Earth and the moon not always in this position?

• because the sun is always moving

• because the moon travels around the sun

• because Earth travels around the sun

• because the tilt of Earth changes

What causes it to appear as if the sun rises and sets each day?

• Earth's gravity

• the spinning motion of Earth

• the revolution of Earth around the sun

• Earth's distance from the sun