Question

Which gas in Earth’s atmosphere forms ozone?

Answer 1

1- oxygen
2- it is good for flying planes
3-carbon dioxide

Answer 2

Answer:

1) Oxygen 2) So The Troposphere is a good place for planes to fly. 3)  $CO_{2}$ 4) It measures how tightly molecules are packed, It pushes molecules in one direction

Explanation:

1) Which gas in Earth’s atmosphere forms ozone?

Oxygen since Ozone is formed when $O_{2}$ receives Ultraviolet in its energetic form$O_{3}$, in a process called photolise.

2) Which characteristics describe the troposphere? Check all that apply.

This layer is the closest to the Earth although it is thicker in the Equator. Most planes fly in there.

So The Troposphere is a good place for planes to fly.

3) Which gas in Earth’s atmosphere has increased over time due to burning fossil fuels?

The outcome burning of fossil fuels is among other gases is the $CO_{2}$

4) Which phrases describe air density?

Although these are not precise descriptions:

It measures how tightly molecules are packed The more density the more molecules are packed in given volume.

It pushes molecules in one direction, In a column of air the more the altitude the more molecules are pushed into the lower altitude region.