A sealed bottle is full of air. The volume of the bottle is decreased, but the temperature remains constant. What other change occurs in the bottle?

Answer:The pressure of the gas in the bottle increases

Explanation:this is governed by Boyles law which states that at constant temperature, the volume of a gas is inversely proportional to it's pressure, i. e mathematically V&1/P at constant temperature, this can be further arranged as P1V1=P2V2. the implication of this formula is that as volume of gases increases, it pressure is decreasing and vice versa.

It is important to note that the constant here is the absolute temperature of the bottle

The air pressure will increase.