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3rd form Physics 1
space revision 2014
| Question | Answer |
|---|---|
| A planet orbits round | the Sun. |
| The time for a planet orbit is called | a year. |
| A moon orbits round | a planet. |
| The time for the Moon to orbit the Earth is approximately | 1 month. |
| What happens to the temperature if a planet is closer to the Sun? | It is hotter. |
| What happens to the length of a year if a planet is closer to the Sun? | It is shorter. |
| What is the name for a 'dirty snowball' that has an non-circular orbit round the Sun? | a comet |
| Where in its orbit does a comet move fastest? | when it is nearest to the Sun |
| What is the name for a large collection of stars? | a galaxy |
| Which satellite orbits the earth faster, one at low height or at a greater height? | The one at a lower height. |
| Out of Earth, Moon, Star, Comet. Which is luminous? | Star |
| The circular path a planet takes round the Sun is called an | Orbit |
| The nearest planet to the Sun is | Mercury |
| Three advantages of having an astronomical telescope as a satellite are: | No clouds spoil view (no weather). No atmosphere absorbs or blocks the different radiations. No particles in the atmosphere scatter the rays/blur the image. |
| A rocket carries LOX because | it is liquid oxygen and there is no air in space to burn the fuel. |