Expansion and Contraction of Gases and Liquids

Front

What is kinetic energy?

Back

The energy of an object that is due to the object's motion.

Front

What happens to a hot air balloon when thermal energy is lessened?

Back

The balloon is contracting.

Front

What occurs to the volume of an inflated balloon on a cold day?

Back

The volume of the balloon decreases.

Front

What causes a balloon to inflate when heated?

Back

Air in the bottle increases in volume when heated.

Front

Why do balloons expand and sometimes burst when heated?

Back

The gas in the balloon expands because the gas particles are moving faster as they heat up.

Front

What is thermal expansion?

Back

The increase in volume of a substance due to an increase in temperature.

Front

What is thermal contraction?

Back

The decrease in volume of a substance due to a decrease in temperature.

Front

How does temperature affect gas particles?

Back

As temperature increases, gas particles move faster and spread apart.

Front

What is the relationship between temperature and pressure in gases?

Back

As temperature increases, pressure increases if the volume is constant.

Front

What happens to the density of a gas when it expands?

Back

The density of the gas decreases.