Astronomy- 1st 15 words
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| the study of the moon, stars, and other objects in space | astronomy
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| an imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates | axis
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| the spinning motion of a planet on its axis | rotation
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| the movement of an object around another object | revolution
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| the path of an object as it revolves around another object in space | orbit
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| a system of organizing time that defines the beginning, length, and divisions of a year | calendar
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| the two days of the year on which the sun reaches its greatest distance north or south of the equator | solstice
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| the two days of the year on which neither hemisphere is tilted toward or away from the sun | equinox
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| a push or pull exerted on an object | force
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| the attractive force between objects; its strength depends on theie masses and the distance between them | gravity
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| the scientific law that states that every object in the universe attracts every other object | law of universal gravitation
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| the amount of matter in an object | mass
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| the force of gravity on a object | weight
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| the tendency of an object to resist a change in motion | inertia
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| the scientific law that 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 | Newton's first law of motion
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