Properties of water - Assessment

1.

Multiple Choice

5 mins

1 pt

Capillary action is the result of adhesion. Which aspect of water is responsible for this?

Nonpolar covalent bonds that enable water to dissolve other substances

Polar covalent bonds that join molecules of water to other substances

Hydrogen bonds between water and another substance

Ionic bonds that enable electrons to flow through water and into another substance

2.

Multiple Choice

5 mins

1 pt

Which of the following properties of water enables it to move from the roots to the leaves of plants?

Water expands as it freezes.

Water is an excellent solvent.

Water exhibits cohesive behavior.

Water moderates temperature.

3.

Multiple Choice

5 mins

1 pt

What property of water allows it to be such a versatile solvent that it is often called the "universal solvent?"

Purity

Polarity and cohesion

High heat capacity

Expansion upon freezing

4.

Multiple Choice

5 mins

1 pt

Large bodies of water do not quickly fluctuate in temperature. Why?

Water is a solvent.

Water has a high heat capacity.

Water acts as a buffer.

Water is non-polar.

5.

Multiple Choice

5 mins

1 pt

Water striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?

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

The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.

The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.

The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

6.

Multiple Choice

5 mins

1 pt

What two elements make up water?

Helium and oxygen

Hydrogen and oxygen

helium and carbon

oxygen and carbon

7.

Multiple Choice

5 mins

1 pt

What word describes when water is attracted to other substances?

cohesion

adhesion

capillary action

surface tension

8.

Multiple Choice

5 mins

1 pt

Why can water have no net charge but have slight charges in different parts of the molecule?

The oxygen end is slightly negative and the hydrogen end is slightly positive

The hydrogen end is slightly negative and the oxygen end is slightly positive

The hydrogen and oxygen ends change in polarity

Because it is hydrophobic

9.

Multiple Choice

5 mins

1 pt

Attractions between water molecules are called

Covalent bonds

Ionic bonds

Polar bonds

Hydrogen bonds

10.

Multiple Choice

5 mins

1 pt

The attraction that causes water and other liquids to form drops on thin films is called ________________. This is also water’s ability to be attraction to other water molecules.

adhesion

capillary action

cohesion

surface tension

11.

Multiple Choice

5 mins

1 pt

Which is NOT a unique property of water?

Frozen water floats on liquid water.

Water covers most of the Earth’s surface and retains a large amount of heat.

Water molecules stick to each other through hydrogen bonds.

Water cools very rapidly.

12.

Multiple Choice

5 mins

1 pt

What property of water helps to moderate earth's temperature?

adhesion

chohesion

Specific heat capacity

Latent heat of vaporization

13.

Multiple Choice

5 mins

1 pt

Why does ice float?

As water freezes, it expands and its density decreases.

As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.

As water freezes, air becomes trapped between the hydrogen bonds of water molecules.

As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

14.

Multiple Choice

5 mins

1 pt

Water is polar because...

The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.

The molecule has two poles, at which the it is colder than other regions of the molecule.

The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.

The water molecule is neutral.

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