Question: Choose your answer.

A device that converts light energy into electricity used in many handheld calculators is a

OPTIONS:
- battery.
- photocell.
- photo generator.
- photovoltaic cell.
My Answer: photovoltaic cell.

Question: Choose your answer.

Falling and rising air and water molecules inside of clouds are believed to be factors in the formation of lightning. Which kind of energy transfer is taking place to cause this weather phenomenon?

OPTIONS:
- electrical to thermal
- thermal to mechanical
- chemical to mechanical
- mechanical to electrical
My Answer: mechanical to electrical

Question: Choose your answer.

The boiling of water results in a physical change in matter from

OPTIONS:
- solid to liquid.
- gas to solid.
- solid to gas.
- liquid to gas.
My Answer: liquid to gas.

Question: Choose your answer.

Which type of organism is the best at fixing nitrogen?

OPTIONS:
- bacteria
- fungi
- protists
- animals
My Answer:
bacteria