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23 Cards in this Set
- Front
- Back
What two elements make up the majority of air
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Nitrogen and oxygen
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Where are elevation and altitude always measured from
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Sea level
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What is a gas that makes up less than 1% of air's composition
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Carbon Dioxide
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What is the difference between ozone and oxygen
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Oxygen has 2 atoms of oxygen, and ozone has 3 atoms of oxygen
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What is the difference between atmosphere and air
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Atmosphere is the envelope of gases that covers a planet where as air is made up of gases that are essential to life and found only on earth.
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As you decrease in altitude what happens to air pressure
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It increases
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As you decreases in altitude what happens to the density of air
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It increases
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As you increase in altitude what happens to the density of the air
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It decreases
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As you increase in altitude what happens to the air pressure
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It decreases
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What is key in making an accurate measurement
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estimating one place
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What is weather
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The condition of the atmosphere at a particular time and place
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What is space with nothing in it called
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vacuum
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The air pressure in a vacuum is
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Nothing (complete) low (partial)
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What happens to the boiling point of water when you decrease the air pressure
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It becomes lower
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What is the order of the layers of the atmosphere, top to bottom
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1) Troposphere 2) Stratosphere 3) Mesosphere 4) Thermosphere
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What is important about the stratosphere
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It contains ozone nad absorbs ultraviolet light
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What is the layer of the atmosphere that is divided into two layers
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Thermosphere
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What are the names of each of these layers
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Ionosphere and Exosphere
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What is important about the troposphere
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It contains the most air molecules (this is the layer we live in)
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Why is the mesosphere important
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It burns up meteoroids and prevents most from damaging earth
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What are three reasons our atmosphere is important
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1) It regulates temperature so that water stays in liquid form 2) It protects us from radiation 3) It holds gases needed for life: oxygen, nitrogen, carbon dioxide, etc.
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How do we know air has mass
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When you weigh a balloon without air and then blow it up and weigh it again, it weighs more. Air also has molecules as well as particles of dust and liquid and these things have mass
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How does a suction cup stay on a smooth surface
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When you press it down, you force the air out, and it is "sealed" to the surface and creates a partial vacuum. Therefore the air on top pushes it down and there is no air inside to push it up
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