1. What is the smallest particle of the element gold (Au) that can still be classified as gold?

a. Atomb. Moleculec. Neutrond. proton

Week 19

2. Which of the following is a compound?

a. Oxygenb. Waterc. Nitrogend. Air

3. A difference between a physical change and chemical change is

thata. Chemical change involves energy wile

physical change does not.b. Physical change involves energy while

chemical change does not.c. Different kinds of molecules are

present after a physical change but not after a chemical change.

d. Different kinds of molecules are present after a chemical change but not after a physical change.

4. Two or more atoms, joined covalently, that act as a unit, are called a(n) __________.

a. Ionb. Atomc. Mixtured. Molecule

5. Base on the following characteristics, classify the state of matter. “High energy, found in stars, consists of freely moving

charged particles.”

a. Gasb. Solidc. Plasmad. Liquid

6. Which state of matter are molecules in contact with each other but free to move around?

a. Solidb. Liquidc. Gasd. Plasma

7. When a hair dryer is being used, one of the energy transformations that takes place is ________________.

a. Electrical to chemical.b. Electrical to mechanical.c. Mechanical to electrical.d. Chemical to electrical.

8. Light is an example of which type of energy?

a. Nuclearb. Gravitationalc. Electromagneticd. chemical

9. What form of energy is associated with the movement of charges, usually

electrons?

a. Chemicalb. Electricalc. Heatd. Sound

10. Which situation is an example of increasing potential energy?

a. Pulling a wagon uphill.b. Emptying a bucket

water.c. A cat jumping from a

tree.d. A bicyclist stopping at

a stop sign.