What is the 'earth's atmosphere' made up of?

Answer 1

#78%# Nitrogen | #21%# Oxygen | #0.9%# Argon | #0.04%# #"CO"_2# | #0.06%# Other Gases

Oxygen and nitrogen are the two primary gases in our atmosphere.

About four-fifths (#80%#) of the atmosphere is nitrogen & one-fifth (#20%#) is oxygen.

The Evolution of Plants removed much of the early Earth's atmosphere's #"CO"_2#, not to mention the introduction of more oxygen removed other harmful gases such as ammonia & methane by reacting with it.

#CH_4 + 2O_ 2 rarr CO_2 + 2H_2O#

#4NH_3 + 3O_2 rarr 2N_2 + 6H_2O#

This made more #"CO"_2# available for plants, created more water to support animal life & got rid of poisonous gases which killed off animal life, without plants, we wouldn't be here.

Hug a tree.

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Answer 2

Eleanor Apodaca

The Earth's atmosphere is primarily composed of nitrogen (78%) and oxygen (21%), with trace amounts of other gases, including argon, carbon dioxide, neon, helium, methane, krypton, hydrogen, xenon, and ozone.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.