Q: Caves form over time when what causes rocks like limestone to dissolve? Choices: - weather - acid - air - water A:
water

Q: In some parts of the world, too much of the sun's harmful uv radiation gets through because of a hole in what layer? Choices: - mesosphere - troposphere - thermosphere - ozone A:
ozone

Q: Q: As a myotube is formed from many different myoblast cells, it contains many nuclei, but has a continuous what? Choices: - nucleus - mucus - cerebellum - cytoplasm A:
A: cytoplasm

Question: Q: What theory of evolution is charles darwin most known for? Choices: - natural change - natural variety - immoral selection - natural selection A:
Answer: natural selection

*Question*
Q: What is the process by which undigested food leaves the body? Choices: - glycolysis - digestion - peristalsis - egestion A:
**Answer**
egestion

*Question*
Q: A mineral can be made of an element or a? Choices: - Sediment - component - cell - compound A:
**Answer**
compound