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Everyday Science: Water Quiz
by Staff
Water is quite arguably the most important substance on Earth. Its unique properties make it an incredibly versitile tool. Aside from fueling life, it's useful in cleaning, cooking and transportation, just to name a few things.

In a water molecule, how is the charge distributed?

  • negatively on the hydrogen side and positively on the oxygen side
  • positively on the hydrogen side and negatively on the oxygen side
  • Neither of the above; water is nonpolar and has an evenly distributed charge.

What percentage of the Earth's water supply is freshwater?

  • 3 percent
  • 15 percent
  • 30 percent

Most of the Earth's freshwater is in:

  • lakes
  • man-made reservoirs
  • aquifers

What percentage of the world's population doesn't have access to clean water?

  • 2 percent
  • 17 percent
  • 38 percent

Oil is an example of a substance that is:

  • hydrophillic
  • hydrophobic
  • hydroponic

What property of water allows it to stick to itself?

  • coagulation
  • adhesion
  • cohesion

In which step of the water cycle does liquid water transform into gas?

  • Evaporation
  • Condensation
  • Precipitation

Our bodies consist of what percent water?

  • 20 percent
  • 40 percent
  • 60 percent

What property of water makes it bead up on waxy surfaces?

  • capillary action
  • universal solvency
  • surface tension

What is the name of the first step in the water-purifying process during which particles clump together?

  • sedimentation
  • coagulation
  • aeration