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Chapter 1 and 2 Vocabulary

Across
Protects from uv light
Metric unit of mass
Smallest unit of matter
78% of air
What plants use for photosynthesis
Turns CO into CO2
Change from inches to meters
Sulfur oxides
Down
21% of air
Abbreviation for parts per million
The humidity that factors in the temp
Insulating earth
What we breathe
Just as important as the number
Requires oxygen
More than one atom
Moisture content of air