Question

Which gas in Earth’s atmosphere forms ozone?

oxygen
nitrogen
water vapor
carbon dioxide

Which characteristics describe the troposphere? Check all that apply.

is the innermost layer
contains the ozone layer
has the highest air pressure
spans 12–50 km above Earth
is a good place for planes to fly



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

oxygen
nitrogen
water vapor
carbon dioxide


Which phrases describe air density? Check all that apply.

increases as altitude increases
equals mass divided by volume
pushes molecules in one direction
exerts more pressure as it increases
measures how tightly molecules are packed

Answer 1

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

Answer 2

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

Step-by-step 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.