Question: Choose your answer.

Extinction of a species is most likely to occur as a result of
My Answer: environmental changes

Question: Choose your answer.

On the periodic table, the elements in group 18 (8A) (helium, neon, argon, etc.) are grouped together because
My Answer: they have full outer electron shells.

Question: Choose your answer.

Katia was listening to music on the radio. In order for the sound to be produced, the electrical energy must be converted into which type of energy?
My Answer: mechanical energy

Question: Choose your answer.

The distance between the Sun and the next closest star, Proxima Centauri, is most accurately measured in
My Answer:
light years.