The Importance of Water in Life

What percentage of Earth's water is freshwater?

• 97%

• 3%

• 10%

• 50%

Where is the majority of Earth's freshwater stored?

• Oceans

• Glaciers and ice caps

• Rivers and lakes

• Atmosphere

Which of the following best describes the molecular structure of water?

• Linear

• Tetrahedral

• Bent

• Planar

What type of bond is primarily responsible for water's unique properties?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

Which property of water allows it to stick to other substances?

• Cohesion

• Adhesion

• Surface tension

• High specific heat

Why is water considered a universal solvent?

• It can dissolve only ionic compounds.

• It can dissolve a wide range of substances.

• It can dissolve only non-polar substances.

• It cannot dissolve any substances.

Which property of water helps moderate Earth's climate?

• Low density

• High specific heat

• Low boiling point

• High viscosity

How does water contribute to cellular processes like osmosis?

• By providing energy

• By acting as a solvent

• By forming solid structures

• By being non-reactive

What is the primary reason for the limited availability of freshwater for human use?

• Most freshwater is polluted.

• Most freshwater is frozen in glaciers.

• Most freshwater is in the atmosphere.

• Most freshwater is in the oceans.

Which of the following is a result of water's high surface tension?

• Water can easily evaporate.

• Water can form droplets.

• Water can dissolve metals.

• Water can conduct electricity.