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science ch8 lesson1
vocab+facts
Question | Answer |
---|---|
astronomy | the study of the universe |
universe | everything that exists(including earth, the planets, the stars, and all of space) |
telescope | a device that collects light and magnifies images to make distant objects appear closer, larger, and brighter |
rotation | one complete spin on an axis |
standard time zone | vertical belt, about 15 degrees, wide in longitude, in which all locations have the same time |
international date line | the 180* line of longitude going west across this line adds one day to the date; going east subtracts a day |
revolution | one complete trip around the sun |
what are 3uses to explore space? | artificial satellites, space probes, and space shuttles |
earth's ______ and ________ are movements that give earth its days and seasons | rotation; revolution |