Term | Definition |
Force | a push or pull |
Gravity | attracts all objects toward each other |
law of universal gravitation | states that every object in motion will stay at motion andany object at rest will stay at rest |
mass | the amount of matter in an object |
weight | the force of gravity on an object |
inertia | the tendency of an object to resist a change in motion |
newtons first law of motion | every object in the universal will attract each other |
astronomy | the study of space |
axis | the imaginary line that passes through the earths north and south poles |
rotation | earth spinning on its axis |
revolution | the movement of one object around another |
orbit | the path of earth around the sun |
calendar | a system of organizing time and dates |
solstice | the day when the sun is right over the equator longest day of the year |
equinox | night and day are equal |
phases | different shapes of the moon |
eclipse | moons shadow hits earths shadow |
solar eclipse | when the moon passes directly between the moon and earths shadow during a full moon |
umbra | the darkest part of the moons shadow |
penumbra | the lighter part of the moons shadow |
lunar eclipse | earth blocks sunlight from reaching the moon |
tide | the moons gravity acting on different parts of the earth |
spring tide | greatest difference between high and low tides |
neap tides | least difference between the high and the low tide |