Energy Change and Conservation

​Energy Change and Conservation

Multiple Choice

During a camping trip, Ming gathers firewood and arranges it in the fire pit. She sets it on fire, and the result is a roaring blaze. Which statement best shows all the energy transformations that take place?

• chemical to thermal

• thermal to electromagnetic

• chemical to thermal and electromagnetic

• chemical and electromagnetic to thermal

Multiple Select

As a candle burns on the table, you can see the electromagnetic energy and feel the thermal energy released. Which two statements are true about the energy involved in burning the candle?

• Chemical energy is created from electromagnetic energy when the candle burns.

• The total amount of all types of energy is conserved when the candle burns.

• Thermal and chemical energy are destroyed by the electromagnetic energy when the candle burns.

• The total chemical energy equals the electromagnetic and thermal energy released when the candle burns.

Multiple Choice

Andre is boiling water to cook pasta. The image shows some of the changes that occur when water is heated and boiled. These changes involve both energy transfers and energy transformations.  What is the difference between an energy transfer and an energy transformation?

• Transfer is movement of energy from one place to another, and transformation is the change of one type of energy to another.

• Transformation is movement of energy from one place to another, and transfer is the change of one type of energy to another.

• There is no difference. Both involve movement of energy from one place to another.

• There is no difference. Both involve the change of one type of energy to another.