Earth and Sun WS 177-178

Name

1. I am a tendency of a moving object to keep moving in a straight line

• inertia
• spin
• ellipse

2. I am the spinning of Earth around its axis. I cause day and night .

• gravity
• revolution
• rotation

3.I am the path that one object , such as a planet , takes as it moves around another object

• inertia
• orbit
• rotation

4. I am one complete trip around the Sun. For Earth, one of me is a year

• rotation
• revolution
• orbit

5. I am the force of attraction, or pull , between two objects. I increase as the mass of the objects increase

• orbit
• gravity
• rotation

6. I am the shape of a planet's orbit

• ellipse
• oval
• round

7. Earth moves in two main ways. Each year, it makes one

• rotation
• revolution
• inertia

8. At the same time, Earth also spins on its

• gravity
• axis
• orbit

9. As it spins , half of Earth faces the Sun and has

• day
• night
• afternoon