OpenSciEd 6.2: Thermal Energy

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of the particles in an object.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when two objects at different temperatures touch each other.

Front

What happens to water when it freezes?

Back

When water freezes, it changes from a liquid to a solid state, forming ice.

Front

What is an open system in terms of thermal energy?

Back

An open system is one where energy and matter can enter or leave the system. For example, a cup of water left uncovered can lose water to evaporation.

Front

What is evaporation?

Back

Evaporation is the process by which liquid water turns into water vapor, usually when it is heated.

Front

What is the role of a styrofoam cup in thermal energy transfer?

Back

A styrofoam cup is an insulator that reduces heat transfer, keeping hot drinks warm for longer.

Front

How does thermal energy travel from a hot object to a cold object?

Back

Thermal energy travels from a hot object to a cold object through conduction, convection, or radiation.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer areas of a liquid or gas rise and cooler areas sink.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as sunlight warming the Earth.

Front

What happens to the temperature of a substance as it changes state?

Back

The temperature of a substance remains constant during a phase change, even though heat is being added or removed.