| A | B |
|---|
| rotate | to turn around |
| axis | a real or imaginary line through the center of a spinning object |
| revolve | to move in a circle around an object |
| orbit | the path an object follows as it revolves |
| satellite | an object that orbits another, larger object |
| phase | apparent change in the Moon's shape |
| crater | a hollow area in the ground |
| eclipse | when one object passes into the shadow of another object |
| solar eclipse | when the moon's shadow blocks the sun |
| lunar eclipse | when Earth's shadow blocks the moon |
| The Earth rotating on its axis causes... | a day = 24 hours |
| The Earth's revolving once around the sun causes... | a year = 365 days |
| We have 4 seasons because... | the Earth is tilted on its axis |
| solar system | a system made up of the sun and all objects that orbit the sun |
| atmosphere | layer of gas that surrounds planets |
| asteroid | a small chunk of rock or metal |
| craters | hollow area in the ground |
| star | a hot glowing sphere that gives off energy |
| gravity | the strong pull that keeps us on the Earth |
| planet | a satellite of the sun |
