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Give an example of greenhouse gases.
carbon dioxide, methane and CFCs
These are gases that absorb heat and makes the Earth hotter.
greenhouse gases
Give one source of air pollutants.
burning wastes, burning coal for power, cars
TRUE or FALSE: Air is a mixture of gases
true
Where do we store the water that is circulated in households?
reservoir
What is used to kill bacteria in drinking water?
chlorine
What do you call the process of water vapor turning into liquid?
condensation
What do you call the recirculation of water that takes place all over the Earth?
water cycle
What color does anhydrous copper sulfate change to when water is present?
white to blue
If water is NOT present, does anhydrous copper sulfate change color?
NO
What do we use to test for presence of water?
anhydrous copper(II) sulfate
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