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Activity 88 and 90
Exploring Space Activity 88 and 90
| Term | Definition |
|---|---|
| Dwarf Planet | a celestial body resembling a small planet, but lacking certain criteria that are required for a planet |
| Comet | Comets are cosmic snowballs of frozen gases, rock and dust that orbit the Sun. |
| Asteroid | a small rocky body orbiting the sun. |
| Meteor | A rocky body (meteroid) that has passed through Earth's atmosphere |
| Galaxy | a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction. |
| Moon | A natural satellite of a planet; |
| Planet | a celestial body moving in an elliptical orbit around a star. |
| Star | a natural luminous body visible in the sky especially at night. |
| Astronomical Unit | a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun. |
| Scale | a ratio between the actual size of an object and its size in a model |
| Proportion | A part of a whole |
| Model | a three-dimensional representation of a person or thing |
| Satellite | an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication. |
Created by:
sbarone
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