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D - Science - Unit 6

The Air Around You - Part 1

What is the atmosphere made up of? a mixture of atoms and molecules of different kinds
What makes up a molecule? it is made up of 2 or more atoms
What is the earth's atmosphere made up of? nitrogen, oxygen, carbon dioxide, water vapor, and many other gases, as well as particles of liquids and solids
What is the most common gas in the atmosphere? nitrogen
Approximately, how much nitrogen is in the air we breathe? 3/4 or 78%
What is the movement cycle of nitrogen? the air to the soil, into living things, and then back into the air
What is the second most abundant gas in the atmosphere? oxygen
Approximately, how much oxygen is in the air we breathe? 1/4 or 21%
What do plants and other organisms use light for? to convert water and carbon dioxide into oxygen and to produce food
What is an example of a process that uses oxygen quickly? a fire burning
What is an example of a process that uses oxygen slowly? iron oxide, or rust forming on steel
What is in a nitrogen molecule? 2 nitrogen atoms
What is in an oxygen molecule? 2 oxygen atoms
What is in a carbon dioxide molecule? 1 carbon atom & 2 oxygen atoms
What do plants do with the carbon dioxide they get from the air? they make food
When plant and animal cells break down food to produce energy, what waste product do they give off? carbon dioxide
What 2 gases make up 99% of dry air? nitrogen & oxygen
What are the other 2 gases that make up the majority of the 1% of dry air? argon & carbon dioxide
What is a form of oxygen that has three atoms of oxygen, rather than two? ozone
Created by: lprinke