AP Bio Ch.3 Quiz

All of the following are true about water EXCEPT

• Water has temperature stabilizing effects.

• Water is composed of two hydrogen atoms held to an oxygen atom by covalent bonds.

• Water is polar, due to the strong electronegative hydrogen atoms it contains.

• Water is a good solvent.

Tags

NGSS.HS-ESS2-5

Which atom in H_2O is the most electronegative?

• The oxygen
• The hydrogen
• Water is a nonpolar molecule
• The charges will constantly shift

Based on your knowledge of the polarity of water molecules, the solute molecule depicted is most likely _____.

• positively charged

• negatively charged

• without charge

• nonpolar

Tags

NGSS.HS-PS2-4

Why does ice float in water?

• The high surface tension of liquid water keeps the ice on top.

• The ionic bonds between the molecules in ice prevent the ice from sinking.

• Stable hydrogen bonds keep water molecules of ice farther apart than water molecules of liquid water.

• The crystalline lattice of ice causes it to be denser than liquid water.

Tags

NGSS.HS-PS1-3

Low humidity in the atmosphere on a hot day _____

• helps in cooling because skin absorbs water from the atmosphere

• does not help in cooling because water evaporates from skin faster

• helps in cooling because water evaporates from the skin faster

• does not help in cooling because skin absorbs water from the atmosphere

Tags

NGSS.HS-PS3-4

Cohesion, surface tension and adhesion are the properties of water molecules that ____

• increase when temperature increases

• increase when pH increases

• are a result of hydrogen bonding

• are a result of covalent bonding

Water molecules can form hydrogen bonds with _____.

• oils

• compounds that have polar covalent bonds

• oxygen gas (0₂) molecules

• chloride ions

What property of water allows it to be such a versatile solvent that it is often called the "universal solvent?"

• Purity
• Polarity and cohesion
• High heat capacity
• Expansion upon freezing

Tags

NGSS.HS-PS1-2

Which of the following properties of water enables molecules to cling together as they move from the roots to the leaves of plants?

• Water expands as it freezes.
• Water is an excellent solvent.
• Water exhibits cohesive behavior.
• Water moderates temperature.

Capillary action is the result of adhesion. Which aspect of water is responsible for this?

• Nonpolar covalent bonds enable water to dissolve other substances.
• Polar covalent bonds join molecules of water to other substances.
• Hydrogen bonds form between water and another substance.
• Ionic bonds enable electrons to flow through water and into another substance.