Energy Transformations & Heat Transfer

Front

The Law of Conservation of Energy states that

Back

energy is always created and destroyed.

Front

Which action below is converting electrical to thermal energy?

• An electric vacuum cleaner
• An electric toothbrush
• An electric toaster

Back

An electric toaster

Front

What affects the gravitational potential energy of an object?

Back

height and weight

Front

Energy of motion is

Back

kinetic energy

Front

When does kinetic energy convert into potential energy when a ball bounces?

Back

When the ball moves upward

Front

When does potential energy convert into kinetic energy when a ball bounces?

Back

When the ball moves downward

Front

When the temperatures of materials that are in contact are the same, the materials are said to be in

Back

thermal equilibrium

Front

What occurs when snowflakes melt in your warm hands? Options: convection, conduction, radiation, thermal balance.

Back

conduction

Front

When snowflakes melt in your hand, thermal energy (or heat) moves from _____________________ to ___________________

Back

your warm hand to the snowflake

Front

Heat transfer is really neat; it always goes from ________ to _________

Back

hot to cold