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| Shaped like cotton balls. |
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| Most likely the producers of thunderstorms |
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| Low clouds that cover like a blanket and bring on precipitation. |
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Decreases as you climb to thigher altitudes and oxygen level decreases.
Breathing can become more difficult. |
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| evaportaion, condensation, precipitation |
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| water vapor heats and rises |
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| water vapor cools in the air to form clouds |
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| air becomes saturated and water falls to the surface |
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| The greatest source of moisture entering the atmosphere through evaporation |
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| caused by pressure in the air |
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| occurs when the temperature is above freezing |
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| occurs when the temperature is below freezing |
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| instruments used to measure air pressure |
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| the variable that the experiementer decides to change to see if there is or is not an effect |
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| The variable that will change as a result of the change in the manipulated variable. May be observed or measured to determine the quantity or quality of change. |
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| Are quantities that a scientist wants to remain constant. |
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| A tentative statement taht proposes a possible explanantion to some phenomenon or event. |
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