Unit 8 Lesson 1 How Do Earth and the Moon Move?

Earth spins around an imaginary line. Which of these words is the name for the imaginary line around which Earth spins?

• axis

• orbit

• rotation

• season

Earth moves in several ways. Which of these words is the name for Earth’s spinning motion?

• equation

• revolution

• rotation

• vibration

Earth’s motions happen in cycles, and they cause cycles we can see. Which of these cycles does the spinning motion of Earth cause?

• the cycle of the tides

• the day-and-night cycle

• the cycle of the seasons

• the phases-of-the-moon cycle

This picture shows one of Earth’s motions.

Which of these motions does the arrow in the picture show?

• cycling

• orbiting

• revolving

• rotating

The girl in the picture has a model that is used to study one of Earth’s cycles.

Which cycle seen on Earth is the girl studying with this model?

• the cycle of the four seasons

• the cycle between day and night

• the cycle of the phases of the moon

• the cycle between low tide and high tide

Harry made this model of the sun and Earth.

Which of these facts does the model let Harry demonstrate?

• The length of Earth’s year is 365 days.

• The seasons change on Earth as it orbits the sun.

• The sun lights one-half of Earth’s surface at a time.

• The time between one morning and the next is 24 hours.

One kind of motion takes Earth around the sun. Which of these words is the name for one complete trip around the sun?

• innovation

• revolution

• rotation

• vibration

One of Earth’s motions causes it to have four seasons. Which of these motions causes Earth to have four seasons?

• revolving

• rotating

• spinning

• vibrating

Elena made this drawing of Earth and the sun.

Which sentence describes what Elena showed in the picture?

• Earth has an equator.

• Earth has four moons.

• Earth rotates on its axis.

• Earth revolves around the sun.

The weather in the northern United States changes as the seasons change. Which of these kinds of weather do you see there only when that part of Earth points away from the sun?

• hot and dry

• mild and wet

• cold and snowy

• warm and stormy