Chapter 1 - Planet Earth
I. Composition and Uses of Gases in the Air
Clean air consists of
Amount Components of Air Uses for Component
78% Nitrogen used in the manufacture of ammonia and
fertilizer
→ Haber process
liquid nitrogen can be used in cryogenics
→ storing embryos and other living tissues at
very low temperatures
used to keep air away from certain products
21% Oxygen production of steel from cast iron
used in oxyacetylene torches
→ produce high-temperature flames to cut
metals
used in hospitals for breathing support
1% Noble gases used in different types of lighting
argon is used to “fill” lightbulbs
→ 0.9% Argon
0.1% Other gases
(Carbon dioxide, water
vapor)
→ 0.04% Carbon Dioxide
The development of Earth’s atmosphere
, II. Pollution of the Air
Pollution concentration is measured in Parts per million (ppm) or Parts per
billion (ppb)
I. Composition and Uses of Gases in the Air
Clean air consists of
Amount Components of Air Uses for Component
78% Nitrogen used in the manufacture of ammonia and
fertilizer
→ Haber process
liquid nitrogen can be used in cryogenics
→ storing embryos and other living tissues at
very low temperatures
used to keep air away from certain products
21% Oxygen production of steel from cast iron
used in oxyacetylene torches
→ produce high-temperature flames to cut
metals
used in hospitals for breathing support
1% Noble gases used in different types of lighting
argon is used to “fill” lightbulbs
→ 0.9% Argon
0.1% Other gases
(Carbon dioxide, water
vapor)
→ 0.04% Carbon Dioxide
The development of Earth’s atmosphere
, II. Pollution of the Air
Pollution concentration is measured in Parts per million (ppm) or Parts per
billion (ppb)
