Over the last million years, what has happened to the total amount of water on earth?

Why is water called a universial solvent?

An increase in which characteristic most likely indicates that sewage is in a stream?

Why should oceans be protected?

What causes water molecules to stick to each other?

What would best allow an oceanographer to study the deep ocean?

Upwelling is the rise of cold water from the depths of the oceans. Which statement best describes the importance of upwelling?

What would most likely cause an increase in a stream’s turbidity level?

What is one method of conserving water?

During the eutrophication of a lake, fertilizers increase the nutrient levels in the water. What best describes how the excess nutrients affect the lake?

What characteristic explains why water has many unusual properties?

Why is chlorine added during the water treatment process?

What is the most likely reason it is illegal to dump chemicals into the soil?

Why are most lakes freshwater?

What will most likely happen to a full bottle of water when it is place in the freezer?

Which statement most accurately describes the water cycle?

Why do tributaries merge to form the Cape Fear River?

Runoff from hog farms on the Coastal Plains works its way into the Cape Fear watershed. Where is this polluted runoff most likely filtered?

What is the difference between point and non point sources of pollution?

What makes up the majority of surface level fresh water on Earth?

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