Understanding Molecule Behavior with Temperature Changes

Front

What happens to molecules when they gain energy?

Back

They move faster and may change state (e.g., solid to liquid).

Front

What happens to molecules when they lose energy?

Back

They move slower and may change state (e.g., liquid to solid).

Front

What is kinetic energy?

Back

The energy that an object possesses due to its motion.

Front

What is temperature a measure of?

Back

The average kinetic energy of the molecules in a substance.

Front

What occurs when two objects at different temperatures come into contact?

Back

Heat energy transfers from the hotter object to the cooler object until they reach the same temperature.

Front

What is thermal equilibrium?

Back

The state reached when two objects in contact have the same temperature and no heat flows between them.

Front

How does temperature affect molecular movement?

Back

Higher temperatures increase molecular movement, while lower temperatures decrease it.

Front

What is the relationship between temperature and molecular speed?

Back

As temperature increases, the speed of molecules increases.

Front

What happens to the molecules in a solid when heated?

Back

They gain energy, vibrate more, and may eventually break free to become a liquid.

Front

What is the effect of cooling on the molecules of a liquid?

Back

They lose energy, move closer together, and may eventually become a solid.