Biology: Properties of Water

Front

What two elements make up water?

Back

Hydrogen and oxygen

Front

What word describes when water is attracted to other substances? Options: cohesion, adhesion, capillary action, surface tension

Back

adhesion

Front

Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called

Back

Hydrogen bonds

Front

Why does ice float?

Back

As water freezes, it expands and its density decreases.

Front

Which end of the water molecule has a slightly positive charge? Options: the oxygen end, the hydrogen end, both ends are slightly positive, neither end is positive

Back

the hydrogen end

Front

Why is water considered a universal solvent?

Back

Dissolves most substances

Front

Which of the following is LEAST likely to dissolve in water? Options: nonpolar fats and oils, polar sugar molecules, salt made of a positive sodium ion and a negative chloride ion

Back

nonpolar fats and oils

Front

Why do large bodies of water, like lakes and oceans, not quickly fluctuate in temperature?

Back

Water has a high specific heat

Front

Why can small insects walk across the surface of calm water?

Back

The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together.

Front

Why does water move from the roots to the leaves of plants?

Back

Capillary action pulls the water molecules like a chain