Unit #1 Assessment Study Guide

What percent of Iodine is left after 24 days?

• 50%
• 6.25%
• 12.5%
• 3.13%

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

What two elements make up water?

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

Why does ice float?

• As water freezes, it expands and its density decreases.
• As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
• As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
• As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

The reason the water balloon did NOT pop while held over a flame is water's _________.

• Less dense than air.
• Hydrogen bonds between water molecules.
• polarity.
• high specific heat capacity.

Capillary Action

• The property of water that allows ice to float on the surface of liquid water

• The property of water that allows it to dissolve polar substances

• When water molecules stick to other surfaces

• The property of water that allows water to move up a thin tube (or the stem of a plant) by itself

What macromolecule is shown?

• Protein

• Nucleic Acid

• Carbohydrate

• Lipid

What is the monomer of a lipid?

• Amino Acid

• Fatty Acid

• Monosaccharides

• Glucose

What is the function of carbohydrates?

• Short term energy

• Long term energy

• Storing genetic information

• Speeding up chemical reactions

What is one of the functions of lipids?

• Storing genetic information

• Long Term Energy

• Short Term Energy

• Acting as chemical signals