Term
| What produces a variety of weather? |
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Definition
| Combination of Earth's motions and energy from the sun. |
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Term
| What is climate based on? |
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Definition
| Climate is based observations of weather that have been collected over many years. Climate helps describe a place or region. |
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Term
| What is air a mixture of? |
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Definition
| Air is a mixture of different gases and particles each with its own physical properties. The composition of air varies from time to time and from place to place. |
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Term
| What two gases make up 99 percent of dry air? |
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Definition
| Nitrogen and oxygen make up 99 percent of the volume of clean, dry air. |
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Term
| What gas plays a significant role in heating the atmosphere? |
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Definition
| Carbon dioxide is an active absorber of energy given off by Earth. |
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Term
| What is the source of all clouds and precipitation? |
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Definition
| Water vapor is the source of all clouds and precipitation |
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Term
| What are some particles that remain suspended for long periods of time? |
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Definition
| Sea salts from breaking waves, fine soil blown into the air, smoke and soot from fires, pollen & microorganisms lifted by the wind. |
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Term
| When do oxygen atoms split into single atoms of oxygen? |
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Definition
| They split when they absorb ultraviolet radiation emitted from the sun. |
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Term
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Definition
| Ozone absorbs harmful UV radiation from the sun. |
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Term
| What accounts for nearly half the primary pollutants by weight? |
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Definition
| Emissions from transportation vehicles. |
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Term
| What are secondary pollutants? |
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Definition
| They are not emitted directly into the air. |
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Term
| What are photochemical reactions? |
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Definition
| Reactions triggered by strong sunlight. |
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Term
| What is atmospheric pressure? |
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Definition
| Atmospheric pressure is simply the weight of the air above. |
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Term
| How many layers is the atmosphere divided into? |
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Definition
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Term
| In what layer do most weather phenomena occur? |
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Definition
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Term
| Where does most energy that drives weather and climate come from? |
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Definition
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Term
| What creates winds and dives the ocean's currents? |
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Definition
| It is unequal heating of Earth that creates winds and drives the ocean currents. |
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Term
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Definition
| Rotation is the spinning of Earth about its axis. |
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Term
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Definition
| Revolution is the movement of earth in its orbit around the sun. |
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Term
| What are the degrees the Earth is tilted? |
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Definition
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