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Chapter 15 VOCAB. SC
chapter 15 vocabulary science
| Question | Answer |
|---|---|
| Astronomy | The study of moon, stars, and other objects in space. |
| Axis | The imaginary line that passes through Earth's center and North and South poles. |
| Rotation | The spinning of Earth on its axis. |
| Revolution | The movement of one object around another. |
| Orbit | The path of an object as it revolves around another object in space. |
| Solstice | The two days of the year on which the sun reaches its greatest distance north or south of the equator. |
| Equinox | The two days of the year on which neither hemisphere is tilted toward or away from the sun. |
| Force | A push or a pull exerted on an object. |
| Gravity | A force that moves rocks and other materials downhill; the force that pulls objects toward each other. |
| Law of Universal Gravitation | The scientific law that states that every object in the universe attracts every other object. |
| Mass | The amount of matter in an object. |
| Weight | The force of gravity on an object. |
| Inertia | The tendency of an object to resist a change in motion. |
| Newton's 1st law of motion | 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. |
| Phase | One of different apparent shapes of the moon as seen from Earth. |
| Eclipse | The partial or total blocking of one object in space by another. |
| Solar Eclipse | The blocking of sunlight to Earth that occurs when the moon is directly between the sun and Earth. |
| Lunar Eclipse | The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon. |
| Umbra | The darkest part of a shadow. |
| Penumbra | The part of a shadow surrounding the darkest part. |
| Telescope | A device built to observe distant objects by making them appear closer. |
| Maria | Dark, flat area's on the moon's surface formed from huge ancient lava flows. |
| Crater | A bowl-shaped area that forms around a volcano's central opening. |
| Meteoroid | A chunk of rock or dust in space. |
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