Earth and Sun Investigation 1 Vocabulary

1.) An imaginary line around which a mass, like a planet, rotates

• axis
• orientation
• compass
• orbit
• opaque

2.) To move or travel around an object in a curved path

• orbit
• orientation
• axis
• compass
• opaque

3.) matter through which light cannot travel

• opaque
• orientation
• axis
• compass
• orbit

4.) the dark area behind an object that blocks light

• shadow
• orientation
• axis
• compass
• orbit

5.) an instrument for determining direction that uses a magnetized needle that always points north

• compass
• orientation
• axis
• orbit
• opaque

6.) the direction something points

• orientation
• axis
• compass
• orbit
• opaque

7.) turning around on an axis

• rotation
• orientation
• axis
• compass
• orbit

8.) to travel around something else in a circular path; another word for orbit

• revolution
• orientation
• axis
• compass
• orbit