Exploring the Essential Properties of Water

What percentage of the Earth's surface is covered by water?

• 50%

• 70%

• 60%

• 80%

What allows water to act as a universal solvent?

• Its polarity and hydrogen bonding

• Its surface tension

• Its density

• Its temperature

Why is water's ability to dissolve substances important for cells?

• It provides energy to cells

• It allows chemical reactions to occur more frequently

• It prevents cell dehydration

• It helps in maintaining cell shape

What property of water causes it to stick to other water molecules?

• Surface tension

• Heat capacity

• Cohesion

• Adhesion

How do cohesion and adhesion properties benefit plants and animals?

• By aiding in nutrient and waste transport

• By providing energy

• By maintaining temperature

• By preventing dehydration

What causes water to have a high surface tension?

• Its density

• Its polarity

• Its hydrogen bonds

• Its temperature

Why can water-striding insects walk on water?

• Because of water's polarity

• Because of water's heat capacity

• Because of water's surface tension

• Because of water's density

What allows water to absorb a large amount of heat without changing state?

• Its polarity

• Its surface tension

• Its hydrogen bonds

• Its density

Why does ice float on water?

• Because ice is less dense than liquid water

• Because ice is more dense than liquid water

• Because of water's surface tension

• Because of water's heat capacity

How does the ice on the surface of a body of water protect aquatic life?

• By increasing oxygen levels

• By acting as an insulator

• By providing nutrients

• By preventing evaporation