Unit 2 Review

Water is a polar molecule. Hydrogen bonding between water molecules is accomplished through the attraction of water’s partial charges. What is the charge of the hydrogen atoms in a water molecule? ________ What is the charge of the oxygen atom in a water molecule?

• Hydrogen: positive, Oxygen: negative

• Hydrogen: negative, Oxygen: positive

• Hydrogen: neutral, Oxygen: neutral

• Hydrogen: positive, Oxygen: positive

Tags

NGSS.HS-ESS2-5

NGSS.HS-PS1-3

What happens to water when it freezes?

• It contracts and becomes more dense.

• It evaporates.

• It expands and becomes less dense.

• It remains liquid.

Tags

NGSS.MS-PS1-4

Capillary action is a property of water. Which of the following is an example of capillary action?

• Water being pulled up from a plant’s roots to its leaves.

• An insect sitting on top of the water’s surface.

• Salt dissolving in a glass of water.

• A drop of rainwater on a leaf.

Tags

NGSS.MS-ESS2-4

What property of water is responsible for regulating an organism’s body temperature?

• High specific heat capacity

• Low density

• Polarity

• High surface tension

Why does ice float in liquid water?

• Because ice is denser than water

• Because ice is less dense than water

• Because ice is heavier than water

• Because ice is colder than water

What two properties of water work together for capillary action to occur?

• Cohesion and adhesion

• Density and surface tension

• Cohesion and high specific heat

• Polarity and solubility

Tags

NGSS.HS-ESS2-5

Which of the following are unique properties of water? (multiple answers)

• High specific heat

• universal solvent

• hydrophobic and hydrophilic

• surface tension

Tags

NGSS.HS-ESS2-5

Which macromolecule functions in storing and transmitting genetic information in living things?

• Carbohydrates

• Proteins

• Nucleic acids

• Lipids

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Amino acids are the monomer of which macromolecule?

• Proteins

• Carbohydrates

• Lipids

• Nucleic acids

Tags

NGSS.HS-LS1-6

Kayla had a breakfast that consisted of toast with cinnamon and sugar. Which macromolecule did she consume the most of?

• Carbohydrates

• Proteins

• Lipids

• Proteins

Tags

NGSS.HS-LS1-6