Energy Unit Part 2: Thermal Energy Transfer

Front

What type of heat transfer occurs when the sun shines down on an object?

Back

Radiation

Front

How is temperature defined in terms of thermal energy?

Back

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

Front

What is the process called when heat is transferred through direct contact between molecules?

Back

Conduction

Front

In which direction does heat transfer occur from a campfire?

Back

Heat transfers away from the fire through radiation.

Front

From where to where does thermal energy transfer heat?

Back

Thermal energy transfers heat from warm objects to cool objects.

Front

What is convection in the context of thermal energy transfer?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) due to differences in temperature and density.

Front

What is the primary mechanism of heat transfer in solids?

Back

Conduction is the primary mechanism of heat transfer in solids.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is touching a hot stove and feeling the heat transfer to your hand.

Front

What is the role of thermal radiation in heating the Earth?

Back

Thermal radiation from the sun warms the Earth's surface, which then radiates heat back into the atmosphere.

Front

How does the density of a fluid affect convection currents?

Back

In convection, warmer, less dense fluid rises while cooler, denser fluid sinks, creating convection currents.