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space
5th grade science
| Term | Definition |
|---|---|
| Atmosphere | the air that surrounds the Earth; it is made of a mixture of gases |
| Axis | imaginary line about which an object rotates |
| Composition | the combination of substances that make up a whole object |
| Orbit | the path that one object in space follows as it revolves around another object in space |
| Revolution | one orbit of an object, such as a planet or satellite, in space around another object in space |
| Rotation | the spinning of a planet, Moon, or other object on its axis |
| Earth | 3rd planet from the sun |
| Moon | the Earth's only natural satellite |
| Solar system | gravitational bound system consisting of the sun and 8 planets |
| Earth | only planet with known life, millions of plants and animal species |
| Moon | made of rock, no life or liquid water |
| seasons | caused by tilt of the Earth |
| Lunar cycle | another name for the moon cycle |
| equator | an imaginary line dividing the Northern and Southern hemisphere |
| appearance | the way something looks |
| full moon | this is when the moon appears to be fully illuminated |
| shadow | this is cast by an object that blocks the sun's light |
| relationship | a connection, association, or involvement |