Question 1

The diagram below shows a hot air balloon rising. Propane gas tanks are seen at the bottom of the balloon. What energy transformation occur when propane gas is used to lift the balloon?

Accepted Answer

Chemical to thermal to mechanical

Answer

Mechanical to light to chemical

Answer

Thermal to chemical to light

Answer

Chemical to mechanical to thermal

Question 2

When a lion eats a zebra and then uses the energy from the zebra to run, the lion's body converts -

Accepted Answer

chemical energy to mechanical energy

Answer

mechanical energy to chemical energy

Answer

electrical energy to chemical energy

Answer

chemical energy to light energy

Question 3

The main parts of a working clothes dryer are shown in the diagram. This appliance dries clothes primarily by converting -

Accepted Answer

electrical energy to heat and mechanical heat

Answer

electrical energy to heat and light

Answer

mechanical energy to heat and vaporization

Answer

mechanical energy to heat and electrical energy

Question 4

A teacher rubbed a match against a piece of sandpaper. The match started to burn. Which statement best describes the energy changes that occurred?

Accepted Answer

The chemical energy stored in the match changed to thermal energy and light energy.

Answer

The thermal energy stored in the match changed to light energy and chemical energy.

Answer

The light energy and thermal energy stored in the match changed to chemical energy.

Answer

The light energy and thermal energy stored in the match changed to mechanical energy.

Question 5

A cook heats a meal in a microwave oven. What energy transformation occurs between the microwave oven and the meal?

Accepted Answer

electrical energy to electromagnetic energy to thermal energy

Answer

electrical energy to light energy to chemical energy

Answer

chemical energy to electromagnetic energy to chemical energy

Answer

chemical energy to thermal energy to light energy

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