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35 Cards in this Set
- Front
- Back
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air
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The invisible, odorless, and tasteless mixture of gases that surrounds Earth.
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nitrogen
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A colorless, odorless, tasteless gas that makes up about four-fifths of the air.
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oxygen
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A colorless, odorless, tasteless gas that makes up about one-fifth of the air.
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carbon dioxide
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A colorless, odorless gas.
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water vapor
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Water that is in the form of a gas. (example: steam)
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atmosphere
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The blanket of air that surrounds Earth, reaching to about 700 km above the surface.
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troposphere
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The layer of atmosphere closest to the surface of Earth.
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weather
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The condition of the atmosphere at a certain place of time.
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greenhouse effect
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The process by heat from the sun builds up near Earth's surface and is trapped by atmosphere.
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wind
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The movement of air over Earth's surface.
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The Greenhouse Effect diagram shows these 4 things:
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a. The sun's rays hit the Earth.
b. Heat from the warmed land go back into the atmosphere. c. Some heat rays escape into space. d. Clouds and gases trap some heat rays in our lower atmosphere. |
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Hot, cold, sunny and cloudy are words used to describe the weather. What are 3 other words used to describe the weather and explain what each means.
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windy - the air is blowing.
rainy - precipitation from the sky. mild - not too hot and not too cold. |
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air pressure
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The push of air in all directions against its surroundings.
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wind vane
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A device often shaped like an arrow used to show the direction of the wind.
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windsock
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A device for wind direction consisting of a cloth bag that is open at both ends and hung on a pole.
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condenses
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To change a gas to a liquid.
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evaporates
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To change a liquid to a gas.
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precipitation
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Any form of water that falls from the air.
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rain gauge
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A device for measuring precipitation.
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relative humidity
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The amount of water vapor present in the air at a given temperature compared to the maximum air could hold at that temperature.
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Describe the water cycle.
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Movement of water into the air as vapor and back to Earth's surface as rain, snow or air.
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As the temperature decreases, the humidity (increases, decreases --choose one).
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decreases
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How can you use a WIND VANE and an ANEMOMETER to help you fly a kite?
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The wind vane would show the wind direction to best fly the kite, and the anemometer would let you know the speed of the wind.
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barometer
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A device used to measure air pressure.
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high-pressure areas
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An area of higher air pressure than that of the surrounding air.
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low-pressure areas
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Area of lower air pressure than that of surrounding air.
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anemometer
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A device used to measure the speed of the wind.
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water cycle
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The movement of water into the air as water vapor, and back to earth's surface as rain, snow or air.
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cloud
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A mass of tiny droplets of water that condensed from the air.
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fog
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A cloud that touches the earth's surface.
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humidity
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The amount of water vapor in the air.
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What is used to measure precipitation?
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A rain gauge
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Imagine that it's a cold winter day. You are outside, talking with a friend. Why can you see your breath as you talk?
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You can see your breath as you talk because the air from your breath is warmer than the air outside.
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Explain why an aluminum can "sweats" when you take it out of the refrigerator on a hot day.
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Because the can is colder than the air, water vapor in the air cools or condenses.
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Suppose you want to find wind speed, wind direction, and air pressure. Which instruments would you use? Explain how each works.
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I would use an ANEMOMETER to measure wind speed. It has cups on spokes attached to a pole. I would use a WIND VANE to show wind direction. It is shaped like a long arrow with a tail. I would use a BAROMETER to measure air pressure, which is either a column of mercury or sealed metal can.
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