Q: In clear weather, a bright light can be seen for a long distance. In conditions of heavy fog, the visibility is greatly reduced. Which of the following explains the reduced visibility?
A: Light is scattered by water droplets in the air.

Q: Which factors can have the greatest effect on the health of a river system?
A: nitrate levels and turbidity

Q: Rocks are classified as igneous, metamorphic, or sedimentary according to
A: how they formed

Q: In animal skin tissue, cell division is responsible for
A:
growth and repair