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D - Science - Unit 6
Layers of the Atmosphere - Part 1
| Question | Answer |
|---|---|
| How many main layers are in the earth's atmosphere? | four |
| The main layers in the earth's atmosphere are classified according to what? | changes in temperature |
| What are the names of the atmosphere's main layers? | troposphere, stratosphere, mesosphere, and thermosphere |
| Which layer of the atmosphere does weather occur and we live in? | troposphere |
| As altitude increases in the troposphere, what happens to the temperature? | it decreases |
| What happens to water at the top of the troposphere? | it forms thin, feathery clouds of ice |
| Although the troposphere is the shallowest layer, what does it contain | almost all of the mass of the atmosphere |
| What happens to the temperature at the top of the troposphere? | it stops decreasing |
| How does the depth of the troposphere vary? | from 16 kilometers above the equator to less than 9 kilometers above the North and South poles |
| Why is the ozone layer important? | it protects earth's living things from dangerous ultraviolet radiation from the sun, it acts as a shield for the Earth's surface and absorbs energy from the sun |
| Why is the thermosphere so hot? | the sunlight strikes this layer first, which cause the nitrogen and oxygen molecules to convert this energy into heat |
| Why would an ordinary thermometer show a low temperature in the thermosphere? | the molecules in this layer are spaced far apart, so there are not enough of them to collide with a thermometer and warm it |
| What causes Auroras? | particles from the sun enter the ionosphere near the poles and strike atoms in the ionosphere, causing them to glow |
| What are the brilliant light displays in the Northern Hemisphere called? | Northern Lights or aurora borealis |
| In which layer is the air pressure the highest? | troposphere |
| Which layer separates the troposphere from the stratosphere? | tropopause |
| Which layer is the coldest region of the atmosphere? | mesosphere |
| Which layer has the thinnest air? | thermosphere |
| Why is the thermosphere so hot? | sunlight strikes the thermosphere first and turns the energy from the ultraviolet radiation into heat |
| What happens to gas particles in the ionosphere? | they absorb ultraviolet and x-ray radiation causing them to become electrically charged (they become ions) |
| What bounce off of the ions in the ionosphere sending them back to Earth's surface? | radio waves |
| In which layer of the atmosphere do satellites orbit the Earth? | exosphere |
Created by:
lprinke
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