The Law of Conservation of Energy

What does the law of conservation of energy state?

• Energy can be created and destroyed.

• Energy cannot be created or destroyed.

• Energy is only created in power plants.

• Energy is always lost in transformations.

Where do we get the energy that is transformed into electricity?

• From the sun only.

• From existing energy sources like coal and wind.

• From creating new energy.

• From water only.

What happens to energy during transformation?

• It is always completely used.

• It can be wasted.

• It becomes new energy.

• It disappears.

Why are LEDs more efficient than incandescent bulbs?

• They waste more energy as heat.

• They create new energy.

• They transform more electrical energy into light.

• They use more electricity.

What is an example of energy transformation?

• Transforming electrical energy into light in a bulb.

• Creating energy from nothing.

• Using wind to create new energy.

• Turning off lights.