Water and Life

What are the four emergent properties of water that are important for life?

• cohesion, expansion upon freezing, high heat of evaporation, capillarity

• cohesion, moderation of temperature, expansion upon freezing, solvent properties

• moderation of temperature, solvent properties, high surface tension, capillarity

• heat of vaporization, high specific heat, high surface tension, capillarity

• polarity, hydrogen bonding, high specific heat, high surface tension

Tags

NGSS.HS-ESS2-5

NGSS.HS-LS2-5

Water shows high cohesion and surface tension and can absorb large amounts of heat because of large numbers of which type of bonds between water molecules?

• strong ionic bonds

• nonpolar covalent bonds

• polar covalent bonds

• hydrogen bonds

• weak ionic interactions

Tags

NGSS.MS-PS3-4

Water has an unusually high specific heat. What does this mean?

• At its boiling point, water changes from liquid to vapor.

• A large amount of heat is required to raise the temperature of water.

• Ice floats in liquid water.

• Salt water freezes at a lower temperature than pure water.

• Floating ice can insulate bodies of water.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

If water was treated with molecules that reduce or remove surface tension, which of the following would occur?

• Treated water droplets would form a thin film instead of beading on a waxed surface.

• Treated water would form smaller droplets when dripping from a sink.

• Water striders would sink.

• All of the above would occur.

In a glass of old-fashioned lemonade, what is the solvent?

• lemon juice

• sugar

• water

• lemonade mixture

• ice

In a glass of cola, what is the solute?

• the glass

• sugar

• water

• gas bubbles

• ice

If you were working with a protein that needed a certain pH to work, what would you need in the solution containing the protein?

• salt

• acid

• buffer

• carbon dioxide

If you were a fish in a pond in the winter in Minnesota, for what property of water would you be most grateful?

• high heat of fusion

• high specific heat

• hydrogen bonding

• cohesion

• adhesion

Tags

NGSS.MS-PS1-4

If you were a spider gliding across a pond in the summer in Virginia, for what property of water would you be most grateful?

• high heat of fusion

• high specific heat

• cohesion

• adhesion

You are looking at your dinner plate and see small circles in the aqueous meat juices on your plate. What word best applies to the circles?

• cohesive

• hydrophobic

• solute

• pH

• None of these apply