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22 Cards in this Set
- Front
- Back
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Weight?
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Gravitation of people/things
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Permanent gases?
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Oxygen and nitrogen are permanent gases
The amount in the air stays constant |
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Variable gases?
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The amount changes in response to activities in the environment
Water Vapor, carbon dioxide, methane, ozone |
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Barometer?
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Measures air pressure
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Anemometer?
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Measures wind speed
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Wind Vane?
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Measures the wind direction
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thermometer?
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Measures temperature
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Hygrometer?
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Measures relative Humidity
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4 Layers of Earth's atmosphere in order from Earth's surface and what occurs at each layer?
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Troposphere - contains most organisms , dust water vapor, and clouds - weather happens
Stratosphere-jet stream flows here- jets fly here Mesosphere - meteors burn up producing shooting stars Thermosphere-very thin,first heated by Sun |
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What causes the layers in the atmosphere?
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Different pressures in the air
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Which gases are increasing in the atmosphere and maybe causing temperatures to warm?
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Methane, water vapor (H2O), and Carbon Dioxide (CO2)
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What does ozone protect us from?
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The ultra violet radiation from the sun
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The difference between molecules in a gas, liquid, and solid?
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solid (ice) cannot be compressed into a smaller space
Liquid - has definite size (volume), but no fixed shape (cannot be compressed ) Gas - has no definite shape or size - expands to fill up containers and be compressed into a smaller piece ( balloon) |
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What happens when air molecules are cooled? ( 2 things)?
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They slow down and come together
They become liquid |
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What happens to air molecules when they heat up?
(2 things)? |
The move faster and become more spread out
become gas |
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Which gases are the most and second most abundant gases in the atmosphere and the % of each?
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Nitrogen 78%
Oxygen 21% |
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3 factors which cause water vapor to vary in the atmosphere?
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Evaporation, condensation, precipitation
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Why Earth has suitable temperatures to support life ( 2 reasons)?
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Earth is the right distance from the sun
Earth is wrapped in a blanket of gases (atmosphere) that keeps temps at a narrow range that is suitable for life |
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What happens to the number of gas molecules, the volume of the gas, and the speed of the gas molecules when they are compressed?
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Difference between mass and weight and which changes when we leave earth?
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Mass - amount of matter in a body - always stays the same
Weight - gravitation force on an object or body -Changes as gravity changes |
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What happens to temperature and pressure as elevation increases through the troposphere and why temps change?
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temps drop as elevation increases because heat from the sun is retained in the ground so air is warmest near the Earth
Atmospheric pressure will decrease as altitude increases, less air is present due to lack of living things around you |
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