How Energy Transfers and Transforms

Friction is a force that causes moving objects to stop.

Energy is lost when friction stops it with heat.

Friction is a force that keeps objects from rolling down hills.

Energy is present in moving objects but not stopped ones.

When something is heated, its temperature rises. That's because its molecules move faster.

Temperature measures the "hotness" or "coldness" of an object

"Heat" refers to thermal energy moving from a hotter system to a cooler one.

Thermal energy transfers in three ways: conduction, convection and radiation.

Thermal energy from the sun travels to Earth because of radiation. Water heats more slowly than land, and the difference in temperature between land and water creates a convection current in the air.

Heat from the sun travels to Earth because of energy transformation. Hot air moves to create wind because of energy transfers.

Thermal energy from the sun travels to Earth because of convection. Water heats more slowly than land, and the difference in temperature between land and water creates a conduction current in the air.

Heat from the sun travels to Earth because of energy transfer. Hot air moves to create wind because of kinetic energy.

thermal energy to transform because of radiation

thermal energy to transfer because of conduction

thermal energy to transfer because of convection

thermal energy to transform because of conduction