States of Matter and Kinetic Energy

Front

What happens to the particles of a substance when thermal energy is added?

Back

The particles move more rapidly at an increased distance from each other.

Front

What does temperature measure in a substance?

Back

Temperature is a measure of a substance's average kinetic energy.

Front

What occurs when the speed of particles decreases?

Back

Their temperature decreases.

Front

What happens to the air inside a hot air balloon when it is heated?

Back

The air inside the balloon expands.

Front

What causes water to freeze into ice in the freezer?

Back

Water has lost energy.

Front

Define kinetic energy.

Back

Kinetic energy is the energy of motion, which depends on the mass and speed of an object.

Front

What are the three main states of matter?

Back

Solid, liquid, and gas.

Front

How do particles behave in a solid state?

Back

Particles are closely packed together and vibrate in place.

Front

How do particles behave in a liquid state?

Back

Particles are close together but can move past each other, allowing liquids to flow.

Front

How do particles behave in a gas state?

Back

Particles are far apart and move freely, filling the space available.