| A | B |
|---|
| rotation | the spinning movement of an object around its' axis |
| revolution | the movement of one object around another object |
| season | caused by Earth's tilted axis and revolution around the Sun |
| axis | an imaginary line connecting the North and South poles cutting through the center of the Earth |
| eclipse | to block something from view |
| solar eclipse | the sun is blocked from Earth's view |
| lunar eclipse | the moon is blocked from Earth's view |
| moon phase | the different shapes that we see of the moon as it moves around the Earth each month |
| equinox | the two days of the year when the Sun is directly over the equator |
| solstice | the two days of the year when the Sun is either the farthest north of south of the equator |
| umbra | the dark shadow created during and eclipse |
| penumbra | the light shadow created during an eclipse |
| gravity | a universal force, attracting one object to another object; affected by mass and distance |
| inertia | 1st law of motion; stating that an object at rest will stay at rest and an object in motion will stay in motion until another force acts on it |
| tides | the daily rising and falling of the Earth's ocean level |
| spring tide | occurs when the the range between high and low tide is the greatest |
| neap tide | occurs when the range between high and low tides is the least |
| craters or impact basin | created by meteorite impacts on the moon's surface |
