Water, Macromolecules and Microscope Review

What is the bond depicted by the dots between the hydrogen of one water molecule and the oxygen of another?

• Hydrogen Bond

• Covalent Bond

• Oxygen Bond

• Polar Bond

Water is essential for life. Its special properties make water the single most important molecule in plant life. Which of the following properties of water enables it to move from the roots to the leaves of plants?

• Water expands as it freezes.

• Water is an excellent solvent.

• Water exhibits capillary action

• Water is able to moderate temperature.

Why does ice stay at the top of oceans instead of sinking to the bottom?

• Ice is colder than liquid water.

• Ice is more dense than liquid water.

• Ice is less dense than liquid water.

• Ice is warmer than liquid water.

Water molecules require a lot of energy to separate one from the others. This gives water a high

• Density

• Solvency

• Polarity

• Heat Capacity

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Small insects can walk across the surface of calm water.  Their feet push the surface of the water sown slightly, somewhat like a person walking across a trampoline, but they do not break the surface.  What is the best explanation for why this happens?

• The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next.

• The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together.

• The insects feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface.

• The insects actually use their wings to hover slightly above the waters surface and they only skim it with their feet.

Tags

NGSS.MS-PS2-5

Which of the following set of elements are found in all macromolecules?

• C O N

• C H P

• C H O

• C H N

Tags

NGSS.HS-LS1-6

Which macromolecule is used as our main source of energy?

• Nucleic Acids

• Carbohydrates

• Proteins

• Lipids/Fats

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

What is the monomer for carbohydrate?

• Nucleotide

• Monosaccharide

• Fatty acids/glycerol

• Amino acids

What is the monomer for lipids?

• Nucleotide

• Monosaccharide

• Fatty acids/glycerol

• Amino acids

What is the monomer for protein?

• Nucleotide

• Monosaccharide

• Fatty acids/glycerol

• Amino acids