CM Unit Test

What safety rules should you always follow while doing a science laboratory?

• Wear safety goggles at all times.

• Clearly label all chemicals.

• Tell your teacher immediately if a spill occurs.

• Do not touch lab materials until told to do so.

• All of the above.

Which of the following happens when the temperature of liquid water drops?

• kinetic energy increases

• kinetic energy decreases

• kinetic energy stays constant

• kinetic energy increases and then decreases

Plastics are made from

• hydrogen and carbon compounds

• sand, soda ash, and limestone

• bauxite

• none of the above

Most elements are what phase at room temperature?

• solid

• liquid

• gas

• Plasma

The compound sucrose has a chemical formula of C12H22O11. How many elements are in one molecule of sucrose?

• 3

• 12

• 22

• 45

Which of the following statements is true?

• The particles in a gas are spread far apart from each other and rarely touch.

• The particles in a liquid are close together but rarely touch.

• The particles in a solid do not move at all.

• The particles in a solid are very close together and can move throughout the whole solid.

A desirable outcome given up to gain another desirable outcome.

(a)  

• Trade-off
• Sacrifice

An electrical attraction between atoms.

(a)  

• Chemical bond
• Physical bond

A varied number of one or more kinds of atom bonded together to form a large network.

(a)  

• Extended Structure
• Single Atom

A single molecular subunit.

(a)  

• Monomer
• Polymer