Bio Quiz section 2.3 water/carbon

What percentage of our bodies is made up of water?

• 50%

• 65%

• 75%

• 80%

What is the term used to describe water's ability to dissolve many substances?

• Surface tension

• Polarity

• Universal solvent

• Hydrogen bonding

What is surface tension?

• The ability of water to dissolve substances

• The tendency of water molecules or liquid surfaces at rest to shrink into the minimum surface area possible

• The attraction between nonpolar molecules

• The ability of water to repel other molecules

What allows objects with a higher density than water to float on a water surface without becoming submerged?

• Surface tension

• Water density

• Water polarity

• High boiling point

What is responsible for the surface tension in water?

• The cohesive forces between liquid molecules

• The high boiling point of water

• The universal solvent property of water

• The density of water

What is cohesion in the context of water molecules?

• The attraction of water molecules to each other

• The attraction of water to other molecules

• The ability of water to dissolve many substances

• The high boiling point of water

What is adhesion in the context of water molecules?

• The attraction of water to other molecules

• The attraction of water molecules to each other

• The ability of water to dissolve many substances

• The high boiling point of water

Why does ice float in water?

• The H bond in water makes ice less dense than water

• Water is heavier because it is less dense

• Water expands, becoming more dense

• Water molecules are loosely compacted

Which of the following is NOT a property of water?

• High surface tension

• High boiling and melting points

• Low density

• Universal solvent

What makes water stay together?

• high melting points

• Adhesion by way of hydrogen bonds

• High boiling point

• Cohesion by way of hydrogen bonds