2223 Thermal Energy, Temperature, Heat and States of Matter

Front

What is the defining characteristic of the liquid state of matter?

Back

The liquid state has a definite volume but no definite shape.

Front

Which state of matter has particles that are widely spaced except when they collide?

Back

Gas.

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of the particles in a substance.

Front

How does temperature relate to thermal energy?

Back

Temperature is a measure of the average kinetic energy of the particles in a substance.

Front

What happens to the particles in a substance when it is heated?

Back

The particles gain kinetic energy and move faster.

Front

What is the difference between heat and temperature?

Back

Heat is the transfer of thermal energy, while temperature is a measure of the average kinetic energy of particles.

Front

What is a characteristic of gases?

Back

Gases have no definite shape or volume and their particles are far apart.

Front

What is the state of matter that has a definite volume but no definite shape?

Back

Liquid.

Front

What happens to the thermal energy of a substance when it changes from a solid to a liquid?

Back

The thermal energy increases.

Front

What is the process called when a liquid turns into a gas?

Back

Vaporization.