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Science Chapter 6
| Question | Answer |
|---|---|
| Satellite | Is a body that orbits a planet. |
| Planet | Is an object that orbits the sun, is a large enough to have become rounded by its own gravity, and cleared the area of its orbit. |
| Meteors | Is a streak of light produced when a small object burns up entering Earth's atmosphere. |
| Comet | Is a cold mixture of dust and ice that gives up a long trail of light as it approaches the sun. |
| Star | Is a giant ball of hit gas, mainly composed to hydrogen and helium. |
| Constellation | Is a pattern or group of stars that people imagined to represent a figure animal or object. |
| Axis | The imaginary line that passes through Earth's center and the North and South poles. |
| Rotation | The spinning of Earth on its axis. |
| Revolution | Is the movement of one object around another. |
| Orbit | Is a slightly elongated circle, or ellipse. |
| Calendar | Is a system of organizing time that defines the beginning, length, and divisions of a year. |
| Solstice | The sun appears farthest north of the equator once each year and farthest south once each year. |
| Equinox | The noon sun is directly overhead at the equator, rises due east, and sets due west. |
| Gravity | Attracts all objects toward each other. |
| Law of Universal Gravitation | States that every object in the universe attracts every other object. |
| Mass | Is the amount of matter in an object. |
| Weight | The measure of the force of gravity on an object. |
| Interia | The tendency of an object to resist a change in motion. |
| Newton's First Law of Motion | Says that an object at rest will stay at rest and an object in motion will stay in motion with constant speed and direction unless acted on by a force. |
| Phases | The different shapes of the moon you see from Earth. They are caused by the motions of moon around Earth. |
| Eclipse | When an object in space comes between the sun and a third object, it casts a shadow on that object. |
| Solar Eclipse | Occurs when the moon passes directly between Earth and the Sun, blocking sunlight from Earth. |
| Umbra | The very darkest part of the moons shadow. |
| Penumbra | The largest part of the shadow. |
| Lunar Eclipse | Occurs at the full moon when Earth is directly between the moon and the sun. |
| Tides | The rise and fall of ocean water that occurs every 12.5 hours or so. |
| Spring tide | The combined forces produce a tide with the greatest difference between consecutive low and high tides. |
| Neap Tide | The suns pull is at right angles to the moons pull. |
| Maria | Are hardened rock formed from huge lava flows that occurred 3-4 billions year ago. |
| Craters | Large round pits. |
| Meteroroids | Chucks or rock or dust from space. |
| Force | Is a push or a pull. |