Sun, Moon, Earth (Ch. 10)
Terms
undefined, object
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- universal law of gravitation
- a law saying all objects attract every other object
- Newton's first law of motion
- law that says objects don't change how they are moving unless something happens
- solstice
- longest amount of day or night - happens twice a year
- orbit
- path a planet takes around the sun
- equinox
- "equal night" 2times per year when there is 12 hours of daylight and 12 hours of darkness
- eclipse
- an object in space comes between the sun and another object
- revolution
- one object moving around another object
- Force
- push or pull
- axis
- imaginary line that goes from the north pole to the south pole through the earth's center
- gravity
- force that attracts objects to each other
- phase
- different shapes of the moon
- lunar eclipse
- earth is between the sun and moon (FULL moon ONLY)
- hemisphere
- "half globe" northern/top half or the southern/bottom half of the earth
- rotation
- spinning in place
- Solar eclipse
- moon is between the sun and earth (NEW moon ONLY)
- inertia
- tendency of an object not to change its motion