Question

The water is poured out of a water bottle, and then the bottle is capped tightly. Which statements describe how air pressure affects the bottle?

Select all the correct answers.

A- The air outside of the bottle pushes inward on the bottle.
B- Air pushes harder on the top of the bottle than on the bottom.
C- The air inside the bottle pushes outward on the bottle.
D- Air pressure changes the shape and size of the bottle.

Answer 1

The correct answer is

A- The air outside of the bottle pushes inward on the bottle

and

C- The air inside the bottle pushes outward on the bottle

:)

Answer 2

Air is present all around and it pushes objects in all direction and, this pushing is known as air pressure.

When water is poured out of a bottle, the air present inside the bottle cools down. As colder air has low pressure in comparison to warmer air, thus, lower pressure is exerted by the air inside the bottle. Now, outside the bottle, air has a higher pressure than the air inside the bottle and this crushes the bottle.

Hence, the air present outside of the bottle pushes inward on the bottle and air present inside will be pushing outward on the bottle

Thus, option (A) and option (C) is the correct answer.