Properties and Behavior of Water

What characteristic of a water molecule causes it to be polar?

• Its small size.

• The equal sharing of electrons between oxygen and hydrogen.

• The oxygen atom's strong attraction for electrons, creating slight charges.

• The presence of only two hydrogen atoms.

What type of bond forms between individual water molecules, allowing them to stick together?

• Covalent bonds

• Ionic bonds

• Hydrogen bonds

• Metallic bonds

Which of the following is NOT considered a unique property of water?

• High surface tension

• Universal solvent

• Low heat capacity

• Cohesion and adhesion

How does water move from the roots to the leaves at the top of a tall tree?

• Through gravity pulling it upwards.

• By the process of transpiration, pulling water molecules up through xylem.

• Plants actively pump water using energy.

• Water evaporates from the roots and condenses in the leaves.

What is cohesion in relation to water molecules?

• The attraction between water molecules and other substances.

• The ability of water to dissolve many substances.

• The attraction between water molecules themselves.

• The process of water changing from liquid to gas.

Which of these is an example of water's high surface tension?

• Sugar dissolving in water.

• Water boiling at 100 degrees Celsius.

• A water strider walking on the surface of a pond.

• Water flowing downhill.

What is adhesion in relation to water?

• Water molecules sticking to each other.

• Water molecules sticking to different types of surfaces.

• Water molecules breaking apart into hydrogen and oxygen.

• Water molecules forming ice crystals.

What two properties of water work together to allow water to move up narrow spaces, like in a paper towel or plant stem?

• High heat capacity and universal solvent.

• Density changes and surface tension.

• Cohesion and adhesion.

• Polarity and low freezing point.