Space Systems Review

Gravity is a force that pulls objects

• up

• toward the center of the Earth

• down

Choose the correct order from smallest to largest.

• planet, solar system, galaxy, universe

• galaxy, planet, solar system, universe

• universe, galaxy, planet, solar system

Earth is a planet in a

• planet

• star

• solar system

Earth is located in the ___________ galaxy.

• largest

• Milky Way

• universe

5. The sun appears bigger and brighter than other stars because it is ______________________.

• farther from Earth than other stars

• closer to Earth than other stars

• larger than other stars

Rotate means:

• To fall

• To orbit or go around in a circular path

• To spin/turn on its axis

Revolve means:

• To fall

• To orbit or go around in a circular path

• To spin/turn on its axis

Earth's daily _______ causes day and night.

• orbit

• gravity

• spin/rotation

Seasons are caused by the __________ of Earth.

• shadows

• rotation

• tilt

10. In summer, the Northern Hemisphere is tilted toward the Sun, so temperatures are warmer and daylight is________.

• equal

• shorter

• longer