Gases in the Atmosphere Crossword Puzzle
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QUESTIONS LIST:
- air : this is a mixture of gases in the atmosphere.
- nitrogen : gas needed to make protein and makes up 78% of the air.
- evaporation : when water turns into water vapor.
- condensation : when water cools and forms clouds.
- gas : state of matter which moves about freely.
- argon : makes up 0.93% of the air.
- precipitation : when water falls to the earth as rain
- collection : when water is collected in rivers, oceans and lakes.
- carbon dioxide : gas needed for photosynthesis and makes up 0.04% of the air.
- oxygen : gas needed for breathing and makes up 21% of the air.
- water cycle : process that recycles the water in the atmosphere over and over again.