Flashcard Heat, Temperature and States of Matter Fall 2024

Front

What is thermal expansion?

Back

Thermal expansion is the increase in volume of a substance due to an increase in temperature, causing its molecules to move faster and spread apart.

Front

What happens to the kinetic energy of molecules when temperature increases?

Back

The kinetic energy of molecules increases as temperature increases, causing them to move faster.

Front

What is the direction of heat flow between objects?

Back

Heat flows from objects that are hotter to objects that are colder.

Front

What does it mean when an object feels cold to the touch?

Back

It means that heat from your hand is transferring into the cold object, making your hand feel cooler.

Front

What is freezing?

Back

Freezing is the process of a liquid changing into a solid when its temperature decreases.

Front

What is the relationship between temperature and molecular speed?

Back

Temperature is a measure of the average speed of molecules in a substance; higher temperatures indicate faster molecular movement.

Front

What is the process of melting?

Back

Melting is the change of state from solid to liquid when a substance is heated.

Front

What is condensation?

Back

Condensation is the process where a gas changes into a liquid, usually when it cools down.

Front

What is evaporation?

Back

Evaporation is the process where a liquid changes into a gas, typically when it is heated.

Front

What is the boiling point?

Back

The boiling point is the temperature at which a liquid turns into vapor.