Water Practice

Which property of water is crucial for aquatic life in cold climates?

• Cohesion

• Adhesion

• Less dense as a solid

• High specific heat

What type of molecules does adhesion involve?

• Identical molecules

• Different molecules

• Non-polar molecules

• Polar molecules

Why does ice float in liquid water?

• Ice is denser than liquid water.

• Ice is less dense than liquid water.

• Ice has the same density as liquid water.

• Ice is heavier than liquid water.

How does the structure of water molecules in ice differ from that in liquid water?

• More tightly packed in ice.

• More loosely packed in ice.

• Identical in both states.

• Randomly arranged in ice.

What property of water makes it good at dissolving things?

• Its color

• Its temperature

• Its polarity

• Its density

Which of the following is an example of a hydrophobic substance?

• Sugar

• Salt

• Oil

• Vinegar

What does "hydrophilic" mean?

• Water "fearing"

• Does not dissolve in water

• Water "loving"

• Example: oil

Which of the following can water NOT dissolve?

• Ionic Compounds

• Polar Compounds

• Nonpolar Compounds

Water has a much higher specific heat than most other covalent compounds. What do you predict might happen if water had a low specific heat instead?

• Flooding would occur and animals would be forced to migrate
•  Harmful organisms living in water would reproduce at a rapid rate
• Organisms that are sensitive to changes in temperature would die
• Plants would not have enough water to effectively carry out photosynthesis

The property where water molecules are attracted to other water molecules.

• adhesion
• capillary action
• cohesion
• universal solvent