Study Guide for Science Quiz #1

Term Definition
altitude the distance above the Earth's surface
line of sight the straight, unblocked path that is followed by light from an object to an eye (what you can see with your eyes without anything blocking it)
horizon the imaginary line where the sky meets Earth or the ocean
point of view the position where an observation is made from
rotation spinning on axis
orbit the path and length of time one object takes to travel around another object (Earth's path around the sun, moon's path around the Earth)
axis an imaginary axle (stick) that a planet spins on

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