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Earth, Moon, and Sun
| Question | Answer |
|---|---|
| The study of the moon, stars, and other objects in space. | Astronomy |
| An imaginary line that passes through Earth’s center and the North and South poles, about which Earth rotates. | Axis |
| The spinning motion of a planet on its axis | Rotation |
| The movement of an object around another object. | Revolution |
| The path of an object as it revolves around another object in space. | Orbit |
| A system of organizing time that defines the beginning, length, and divisions of a year. | Calendar |
| The two days of the year on which the sun reaches its greatest distance north or south of the equator. | Solstice |
| The two days of the year on which neither hemisphere is tilted toward or away from the sun. | Equinox |
| A push or a pull exerted on an object. | force |
| The attractive force between objects; its strength depends on their masses and the distance between them. | gravity |
| The scientific law that states that every object in the universe attracts every other object. | law of universal gravitation |
| The amount of matter in an object | mass |
| The tendency of an object to resist a change in motion. | inertia |
| 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 |
| One of the different apparent shapes of the moon as seen from Earth. | phases |
| The partial or total blocking of one object in space by another. | eclipses |
| The blocking of sunlight to Earth that occurs when the moon is directly between the sun and Earth. | Solar eclipse |
| The darkest part of a shadow. | umbra |
| The part of a shadow surrounding the darkest part. | penumbra |
| The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon. | lunar eclipse |
| The periodic rise and fall of the level of water in the ocean. | tides |
| The tide with the greatest difference between consecutive low and high tides. | spring tide |
| The tide with the least difference between consecutive low and high tides. | neap tide |
| A device built to observe distant objects by making them appear closer. | telescope |
| Dark, flat areas on the moon’s surface formed from huge ancient lava flows. | maria |
| A large round pit caused by the impact of a meteoroid. | crater |
| A chunk of rock or dust in space. | meteoroids |
Created by:
MrCscience
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