AP Biology Properties of Water

What is cohesion in water molecules?

• Ability of water molecules to stick to other substances

• Ability of water molecules to stick to themselves

• Measurement of how difficult it is to break the surface of water

• Process of water molecules sticking to non-polar substances

Which property of water allows insects to walk on its surface?

• Low Cohesion

• High Adhesion

• High Surface tension

• Low density of water

Which of the following best describes hydrogen bond?

• attraction between hydrophobic molecules

• attraction between partial positive oxygen and partial negative hydrogen

• attraction between two hydrogen ions

• attraction between partial positive hydrogen and partial negative oxygen.

Why does ice float on water?

• Ice is denser than liquid water

• Hydrogen bonds make ice less dense than liquid water

• Ice repels water molecules

• Ice molecules are closer together than water molecules

what does pH measure?

• Concentration of hydrogen ions

• Attraction between ions

• Ability of molecules to stick to themselves

• Density of a substance

What is a solvent?

• Substance that is dissolved in another substance

• Substance that dissolves solutes

• Substance that is non-polar and cannot dissolve in water

• • Substance that measures acidity

Which of the following best describes hydrolysis?

• Utilizing water to break down polymers or dimers into monomers

• breaking down polymers or dimers into monomers and water

• removing OH and H from another molecule to form a dimer or polymer and water

• adding water to form a dimer or polymer from monomer

Tags

NGSS.MS-LS1-7

Surface tension of the water is the cohesive force between water molecule on the surface of water.

• True

• False

Cohesive force between water molecules and adhesive force between water molecules and other molecules enable this phenomenon __________________ occur.

• surface tension

• capillary action

• float on water

• photosynthesis

Water exists in this forms :

• Gas

• Plasma

• Liquid

• Solid

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4