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20-2 (Science)
| Question | Answer |
|---|---|
| Artificial Satellite | Any human-made object placed in orbit around a body in space. |
| Name three kinds of artificial satellites. | Weather satellites, communication satellites, and remote-sensing satellites. |
| What do weather satellites do? | Provide continuous updates on the movement of gases in the atmosphere so that we can predict weather on Earth's surface. |
| What do communication satellites do? | Relay TV programs, phone calls and computer data. |
| What do remote-sensing satellites do? | Monitor changes in the environment. |
| What is the name of the first artificial satellite and who was it launched by? | Sputnik 1; The Soviets (Russia) in 1957. |
| What artificial satellite carried the first living being into space and what was the being? | Sputnik 2; A dog named Laika. |
| What was the name of the US first satellite and when was it launched? | Explorer 1 in 1958. |
| Low earth orbit | An orbit that is less than 1,500 km above Earth's surface. |
| Geostationary orbit | An orbit that is about 36,000 km above Earths surface and in which a satellite is above a fixed spot on the equator. |
| How does a satellite in GEO move? | It travels in an orbit that exactly matches Earths rotation and is always above the same spot on Earth. |
| How does a satellite in LEO move? | It moves around earth very quickly and can provide clear images of Earth. |
Created by:
mitchey64
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