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Atmosphere & Space
7th grade: Atmosphere and Space
| Question | Answer |
|---|---|
| how many layers are there in the atmosphere? | five |
| which layer is nearest to the Earth where the weather occurs? | troposphere |
| in which layer do jets fly the most? | stratosphere |
| which layer protects the earth from ultraviolet radiation from the sun? | ozone |
| which layer is the coldest layer of the atmosphere and where meteors burn up? | mesosphere |
| which layer is the hottest layer of the atmosphere? | thermosphere |
| which layer is the outermost layer of the atmosphere? | exosphere |
| which gas is most abundant in the Earth's atmosphere? | nitrogen |
| what causes wind? | uneven heating and cooling air; heat rises and cool air sinks |
| what is a convection current? | the up and down air motion |
| what is an orbit? | a curved path that an object takes around a larger object |
| What orbits the Earth? | the moon, space craft and satellites |
| what is gravity? | the force of attraction between two objects |
| what is velocity? | speed in a given direction |
| what is centripetal force? | force that makes an object move in a circular pattern |
| what is orbital velocity? | the speed and direction that an object must maintain to stay in orbit |
| what two properties change with altitude? | air pressure and air temperature |
Created by:
mharlan
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