Earth's Atmosphere 6.5B

the upper sphere and the lower sphere.

the living sphere and the non-living sphere.

the atmosphere, geosphere, biosphere, and hydrosphere.

the inner sphere, middle sphere, outer sphere, and space sphere.

78%

21%

3%

8%

Oxygen

Silicon

Nitrogen

Carbon

Helium

none

very low amount; uncommon and hard to find

found in a large amount; common

exhibiting a full spectrum of color

so many different elements that they cannot all be listed.

all of the elements on the Periodic Table equally.

a limited number of known elements.

no elements at all.

Silicon and Argon

Argon and Aluminum

Nitrogen and Oxygen

Helium and Nitrogen

Oxygen

Silicon

Aluminum

Iron

Calcium

Nitrogen

Oxygen

Argon

Carbon Dioxide