Science 7th Astronomy 1
Terms
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- mass
- the amount of matter in an object
- Newton's first law of motion
- states that an 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 a force
- maria
- dark, flat areas on the moon's surface formed from huge ancient lava flows
- calendar
- a system of organizing time that defines the beginning, length, and divisions of a year
- revolution
- the movement of an object around another object
- weight
- the force of gravity on an object
- astronomy
- the study of moon stars and other objects in space
- telescope
- a device built to observe distant objects by making them appear closer
- eclipse
- the partial or total blocking of one object in space by another
- umbra
- the darkest part of a shadow
- force
- a push or pull exerted on an object
- equinox
- the two days of the year on which neither hemisphere is tilted toward or away from the sun
- inertia
- the tendency of an object to resist a change in motion
- solstice
- the two days of the year on which the sun reaches it greatest distance north or south of the equator
- axis
- an imaginary line that passes through Earth's center and the N and S poles, about which the earth rotates
- craters
- a large round pit caused by the impact of a meteoroid
- meteoroid
- a chunk of rock or dust in space
- orbit
- the path of an object as it revolves around another object in space
- spring tide
- the tide with the greatest difference between consecutive low and high tides
- lunar eclipse
- the blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
- penumbra
- the part of a shadow surrounding the darkest part
- phase
- one of the different apparent shapes of the moon
- gravity
- the attractive force between objects
- neap tide
- the tide with the least difference between consecutive low and high tides
- law of universal gravitational
- states that every object in the universe attracts every other object
- tide
- the periodic rise and fall of the level of water in the ocean
- rotation
- the spinning motion of a planet on its axis
- solar eclipse
- the blocking of sunlight to earth that occurs when the moon is directly between the sun and earth