Properties of Water

What two elements make up water?

• Helium & Oxygen

• Helium & Carbon

• Hydrogen & Oxygen

• Oxygen & Carbon

A water strider can skate along the top of a pond because:

• specific heat

• adhesion

• surface tension

• capillary action

What is the scientific word describing how water has the ability to stick to other substances?

• cohesion

• capillary action

• adhesion

• surface tension

Why is water considered a polar 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.

• Because it is hydrophobic

• The hydrogen and oxygen are covalently bonded.

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

• Water is pushed by solutes

• Water is pulled by gravity adhesion

• Capillary action pulls the water molecules up

• Water's cohesion causes it to "pull" towards the leaves

Water molecules have the ability to attract other water molecules to themselves and bond with them through which process?

• Covalent Bonds

• Polar Bonds

• Ionic Bonds

• Hydrogen Bonds

Which of the following statements is false about the unique properties of water?

• Frozen water floats on liquid water unlike other substances that will sink in water when frozen solid.

• Water molecules stick to each other through the process of hydrogen bonds.

• Water covers 70% of the Earth's surface and retains a large amount of heat which helps control climate change.

• Water cools very rapidly because it has a very high specific heat capacity.

Which of the following is the correct explanation for water being polar?

• The equal sharing of electrons between the oxygen and hydrogen atoms creates a partial positive and negative charge.

• The unequal sharing of electrons between the oxygen and the hydrogen atoms creates a partial positive and negative charge.

• The unequal hydrogen bonds between the oxygen and hydrogen atoms creates a partial positive and negative charge.

• The equal sharing of positive protons between the oxygen and hydrogen atoms creates a partial positive and negative charge.

Which property of water will cause water to bead up on the side of a drinking glass?

• Adhesion

• Cohesion

• High Specific Heat

• Capillary Action

Which of the following substances is LEAST likely to dissolve in water?

• Fats, Oils, and Lipids

• Salt made of positive sodium ion and a negative chloride ion

• Sugar Molecules

• All the substances will dissolve easily in water