Question

As air becomes more dense, _____. (Select all that apply)

O. air weighs less
O. gas molecules are closer together
O. air is colder
O. air weighs more
O. gas molecules are further apart
O. air is hotter

Answer 1

air weighs more

air molecules are closer together

air is colder

Explanation: Trust me, I did the test and it was correct

Answer 2

The answers that apply are;

1. gas molecules are closer together
2. air weighs more
3. air is hotter

When air is compressed, it means the same volume of space is occupied by more air molecules. This, therefore, means that the molecules are hitting each other with a higher frequency hence become hotter with more compression. It weighs more because there are more molecules in the same volume of space.