Energy

Which statement describes thermal energy?

Energy that is associated with temperature

A welding torch produces a flame by burning acetylene fuel in the presence of oxygen. The energy released from the acetylene fuel is then used to melt a metal.

Chemical energy turns into thermal energy.

According to the law of conservation of energy, what will most likely happen in a closed system?

Energy will be exchanged, but matter will not be exchanged.

What happens to energy when Sally kicks a soccer ball?

Kinetic energy is transferred from the leg to the soccer ball.

A generator contains a coil that spins to produce an electric current. How is energy transformed by using a generator?

Mechanical energy is transformed to electromagnetic energy.

An arrow is fired at a target on a high wall. How does the energy change between the moment the arrow is fired and the moment it hits the target?

The kinetic energy decreases as potential energy increases.

Which is the best example of potential energy?

holding a basketball in the air

What type of energy is the sum of an object's potential and kinetic energy?

mechanical energy

When an object falls toward the ground due to gravity, what type of energy becomes kinetic energy?

potential

Thermal energy is the energy associated with

temperature.