Question

which layer of the atmosphere do we live in and also contains earth’s weather?
○ stratosphere.
○ mesosphere.
○ troposphere.
2 multiple choice 1 point
which is the most abundant (most common) gas in earth’s atmosphere?
○ carbon dioxide (co₂)
○ nitrogen (n₂)
○ oxygen (o₂)

Explanation:

First Question:

The troposphere is the lowest layer of the atmosphere where humans live, and it is where most weather phenomena (like clouds, rain, wind) occur. The stratosphere is above the troposphere and contains the ozone layer, while the mesosphere is higher up and not related to daily weather or human habitation at the surface.

Earth's atmosphere is composed mainly of nitrogen (about 78%), oxygen (about 21%), and a small percentage of other gases including carbon dioxide (less than 1%). So nitrogen is the most abundant gas.

Answer:

C. troposphere.

Second Question: