Front

What is thermodynamics?

Back

Thermodynamics is the branch of physics that deals with the relationships between heat and other forms of energy.

Front

What happens to molecular motion as temperature increases?

Back

Molecular motion increases as temperature increases, meaning molecules move faster at higher temperatures.

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of the particles in a substance, related to its temperature.

Front

What is the direction of heat transfer?

Back

Heat always transfers from a high temperature object to a lower temperature object.

Front

What are the three phases of matter?

Back

The three phases of matter are solid, liquid, and gas.

Front

Which phase of matter has the least molecular motion?

Back

Solid has the least molecular motion.

Front

What is heat?

Back

Heat is the transfer of thermal energy between objects of different temperatures.

Front

What must happen to water to freeze it?

Back

Energy must be removed from the water to freeze it.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of motion, which increases with the speed of an object.

Front

What is the relationship between temperature and kinetic energy?

Back

As temperature increases, the average kinetic energy of the molecules in a substance also increases.