| A | B |
|---|
| force | push or pull |
| gravity | attracts all objects torward eachother |
| universal law of gravity | every object in the universe attracts every other object |
| mass | amount of matter in an object |
| weight | the force of gravity on an object's |
| inertia | the tendency of a object to resist a change in motion |
| newtons first law of motion | object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by an unbalanced force |
| phases | different shaps of the moon you see from Earth |
| eclipse | when an object in space comes between the sun and third object it cast a shadow on that object causing an eclispe |
| solar eclipse | new moon blocks your view of the sun |
| umbra | darest part of the moon's shadow |
| penumbra | largest part of the shadow |
| lunar eclipse | occurs at a full when Earth is directly between the moon and the sun |
| tides | the rise and fall of the ocean water |
| spring tide | their combined forces produce a tide withthe greatest between consecutive low and high tides |
| neap tide | a tide with the least difference between consecutive low and high tides |
