The Inner Planets
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Created by:
HarterScience on February 3, 2011
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Description:
The inner planets introduction to chapter 9 sections 1 and 2
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27 terms
Terms | Definitions |
|---|---|
 Astronomical Unit | The distance between the Earth and the Sun |
| Terrestrial Planet | Deals with planet composition- the first four planets are small dense and rocky |
| prograde rotation | Counterclock wise rotation like the Earth |
| retrograde rotation | Clockwise rotation like that of Venus |
| Gas Giant | Deals with planet composition- A planet that has a deep massive atmosphere (made of gas) such as Jupiter, Saturn, Uranus, and Neptune |
| Satelite | A natural or artifical body that revolves around another body in space. Example the moon is a _______ of the Earth. The Earth is a ______ of the sun |
| Comet | A small body of ice, rock, and cosmic dust that follows an ellipical orbit around the sun and that gives off gas and dust and forms a tail when it is close to the sun. |
| Asteroid | A small rocky object that orbits the sun usually in a band between Mars and Jupiter |
| Asteroid Belt | The region of the solar system between the orbits of Mars and Jupiter in which most asteroids orbit |
| Meteroid | small rocky body that travels through space |
| Meteroite | A meteroid that reachs the surface of the Earth without burning up completely |
| Meteor | A bright streak of light that results when a meteroid burns up in the Earth's atmosphere |
| Period of Revolution | The time it takes for a body in space to orbit completely around another body = 1 year |
| Period of Rotation | The time it takes for a body to turn (spin) completely around = 1 day |
| Density | the amount of matter in a given space |
| weight | a measure of the gravitational force exerted on an object; its value can change with the location of the object in the universe |
| radius | The distance from the center of a circle to a point on the circle |
| diameter | the measurement across an object, passing through the center |
| temperature | a measure of how hot (or cold) something is; specifically, a measure of the average kinetic energy of the particles in an object |
| mass | the amount of matter in an object |
| compostion | what its made of. |
| shape | the visual appearance of something |
| atmosphere (composition) | the envelope of gases surrounding any celestial body |
| location | Where it is located in the solar system (example 4th planet from the sun, or asteroid belt, or Kuiper Belt -Pluto and beyond) |
| Number of Moons | Number of discovered moons that orbit the body |
| Presence of water | Has water been discovered water on the body or on it's moon system? |
| surface features | What the surface (if it has any!) looks like- example does it have mountains, volcanoes, crater marks, hills, valleys, etc....? |
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