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| Question | Answer |
|---|---|
| asteroid | any of the small,solid planet that orbit the sun. |
| comet | a small frozen mass of ice and dust oriting the sun. |
| terrestrial | relating to land. |
| orbt | to travel in a curved path around the sun or |
| rotation | one complete turn on an axis. |
| satellite | a moon that orbits a planet. |
| matter | Anything that takes up space and has mass. |
| mass | the amount of material in something. |
| molecule | the smallest particle of a substance.A molecule is usually made of two or more atoms. |
| milky way galaxy | one of many collections of stars that make up the universe. |
| gas giant | Any of the second four planets from the sun,wich are made of gas. |
| solar energy | energy from the sunlight.This energy takes several froms,including visible light and infrared light that can be felt as heat. |
| light | a form of energy that travels in waves and can move through empty space where there is no air. |
| heat energy | the energy of moving particles in a substance. |
| absorption | The loss of light as it passes though a material,generally due to its conversion to other energy forms(usally heat). |
| reflection | the bouncing back of ligh ray from a surface. |
| thermomrter | A tool that is used to measure temperture. |
| temperture | the average speed of particles in a substance. |