Water Properties and Macromolecules Practice

What two elements make up water?

• Helium and oxygen
• Hydrogen and oxygen
• helium and carbon
• oxygen and carbon

A molecule with electrically charged areas is called a _______________.

• magnet
• polar molecule
• solution
• electrical molecule

Why can fish survive winters in a pond?

• ice is less dense than liquid water so it will be on the top of a lake or pond allowing fish to swim beneath it

• water is available in all 3 phases so ice will be on the top of a lake or pond allowing fish to swim beneath it

• water is polar so ice will be on the top of a lake or pond allowing fish to swim beneath it

• Adhesion so ice will be on the top of a lake or pond allowing fish to swim beneath it

Why is water so good at dissolving so many substances?

• it is polar

• it is less dense as a solid

• cohesion

• adhesion

This image best shows which water property?

• Adhesion

• Cohesion

• Universal Solvent (dissolve many substances)

• High Heat Capacity

This image best shows which water property?

• High Surface Tension

• Cohesion

• Universal Solvent (dissolve many substances)

• High Heat Capacity

This image best shows which water property?

• That water is adhesive and can stick to itself.

• That water is cohesive and can stick to other substances.

• That water is a universal solvent.

• That water is adhesive and cohesive, which allows it to move from roots to leaves.

Which is TRUE about this image?

• The image on the left is representing solid ice.

• The image on the left is less dense.

• The image on the right is less dense.

• The image on the right is liquid water.

A __________________ is a large molecule made of many small ones.

• Monomer

• Dissacharide

• Polymer

• Sugar

Answer explanation

Poly means many- so a polymer is many molecules linked together.

Which macromolecule is used as our main source of energy?

• Nucleic Acids

• Lipids/fats

• Proteins

• Carbohydrates

Answer explanation

We use carbohydrates as our energy source. We break down the carbohydrates into smaller, simpler sugars, which we can absorb and use for energy.