States of Water and Water Distribution

What is the composition of a water molecule?

• One hydrogen atom and two oxygen atoms

• Two hydrogen atoms and one oxygen atom

• Three hydrogen atoms

• Three oxygen atoms

Which characteristic describes the water molecule's polarity?

• Both sides have equal charges

• The side with hydrogen ions has a slightly negative charge.

• The side with hydrogen ions has a slightly positive charge.

• The water molecule has no electrical charge

What unique property does water have when it freezes?

• It becomes more dense

• It contracts like other substances

• It expands

• It loses its polarity

Why can some insects walk on water?

• They are less dense than water

• Water has high surface tension

• The water is very dense

• This is nonsense. Insects do not walk on water.

What percentage of Earth's water is freshwater?

• 50%

• 15%

• 3%

• 97%

Where is most of Earth's freshwater found?

• In lakes and rivers

• In underground aquifers

• In ice caps and glaciers

• In the atmosphere

Why isn't ocean water suitable for human use?

• It contains too much salt

• It's too cold

• It's too deep

• It moves too much

Earth is the ONLY planet in our solar system that has water in all three states?

• True

• False

What are the three states of water?

• Hot, warm, and cold

• Rain, snow, and ice

• Solid, gas, and plasma

• Solid, liquid, and gas

What is a reservoir in the context of water distribution?

• Only man-made water storage facilities

• Only underground water sources

• A location where water remains for a long time

• A place where water moves quickly