IB Biology Topic 2.2 Review

What intermolecular force is present between water molecules?

• Hydrophobic interactions

• Covalent bonding

• Hydrogen bonding

• Ionic interactions

An example of cohesion of water molecules is:

• the binding together of two water molecules.

• the binding together of water molecules with molecules of cellulose in leaves.

• the separation of oil and water in a mixture.

• hydrogen bonding.

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NGSS.MS-ESS2-4

An example of cohesion of water molecules is:

• the binding together of two water molecules.

• the binding together of water molecules with molecules of cellulose in leaves.

• the separation of oil and water in a mixture.

• hydrogen bonding.

Select the best answer. Water is a good coolant because:

• It's thermal properties make it a good coolant.

• It has a low melting point.

• It has a high latent heat of vaporization.

• It has a high boiling point.

Select the best answer. Water is a stable medium for aquatic habitats because:

• It's thermal properties make it a stable medium.

• It has a high specific heat capacity.

• It has a high latent heat of vaporization.

• It has a high boiling point.

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

Select the best answer. Water is good at dissolving charged and polar molecules because:

• Water is a good solvent.

• Water molecules are polar.

• Water molecules are small and polar.

• Water molecules are small, polar, and ionic.

A hydrophilic substance is:

• A substance that is soluble in water.

• A substance that is insoluble in water.

• A substance that is polar.

• A substance that forms intermolecular interactions with water.

Choose the best definition for hydrophobic.

• A non-polar substance that is insoluble in water, but soluble in ethanol and other nonpolar solvents.

• A fatty acid.

• A substance that does not form strong intermolecular interactions with water.

• A substance that is insoluble in water.

Select all that apply. Which substances are transported by being dissolved in blood plasma?

• Cholesterol

• Amino Acids

• Oxygen

• Sodium Chloride

• Glucose

The property that accounts for most of the differences between methane and water is:

• Methane is hydrophobic while water is hydrophilic.

• Methane is nonpolar while water is polar.

• They are both small molecules.

• Methane is made up of carbon and hydrogen while water is made up of oxygen and hydrogen.