1. Brass paper clips that have a golden color have 33% zinc and 67% copper. Paper clips made of brass, that appear more red in color, have almost 90% copper and only 10% zinc. If the paper clips are the same size, which of the following will be different? A. Height
B. Density
C. Magnetism
D. Thermal Conductivity

2. Harry did a study to determine the amount of movement of particles in three states of matter. He wanted to write them down in order from the least amount of movement to the most. Which answer below lists the freedom of movement of particles in the states of matter from least freedom of movement to most freedom of movement?

A. Gas Liquid Solid
B. Liquid Solid Gas
C. Solid Liquid Gas
D. Gas Solid Liquid

3. Fred had 100ml of water, 100ml of maple syrup, and 100 ml of peanut butter. (answer yes or no)

a. Do all 3 substances have the same volume?

b. Do all 3 substances have the same mass?

c. Do all 3 substances have the same density?

4. Find the volume of a piece of metal with a density of 4.0 m/cm3 and a mass of 8.0 grams.

Density = Mass
Volume
A. 32.0 cm3
B. 0.5 cm3
C. 2.0 cm3
D. 4.0 cm3

5. Two very special students were playing catch with a magnet. Unfortunately one of the students missed the magnet causing it to fall to the ground and break into many small pieces. Which statement below describes the properties of the smaller pieces?

A. All of the small pieces will be magnetic
B. All of the small pieces will have a different density
C. All of the small pieces will have different melting points
D. All of the small pieces will grow legs and attack the special students for playing catch with a magnet.

6. Lucy knew that a tea cup of water has a boiling point of 100˚ Celsius. She currently has a 5 liter soup pan filled with water. At what temperature will the 2.5 two liters of water boil?

A. 500˚ Celsius
B. 0˚ Celsius
C. 105˚ Celsius
D. 100˚ Celsius

7. A triangular pyramid is build out of 41 identical small coins.

Which statement best compares coin A to the entire pyramid?

A. Coin A has the same mass at the entire pyramid
B. Coin A has the same density of the entire pyramid
C. Coin A has the same volume as the entire pyramid
D. Coin A has the same weight at the entire pyramid

8. What must ALWAYS occur in a chemical change that does not occur in a physical change?

9. Two sets of materials were classified according to a single physical property shown below.

A Items B Items
Copper Ring Wooden Ruler
Silver Fishing Weights White T-Shirt
Steel Door Knob Plastic Paper Clip

A. Electrical Conductivity
B. Melting Point
C. Reactivity with H2O
D. Weight

10. What is a catalyst?

11. Give an example of a common catalyst used in science classes.

12. List what type of change is occurring in each of the situations below: PHYSICAL or CHEMICAL

Melting iron ore into bars of iron:

Rust forming on a metal nail:

Burning of a piece of paper:

Mixing of salt in water until it dissolves:

13. Explain the difference between a chemical and physical change.

14. What phase change is occurring as we move from sample B to sample C?

Sample A Sample B Sample C

A. A gas to a liquid
B. A solid to a gas
C. A liquid to a solid
D. A liquid to a gas

15. As temperature increases the molecules rate of movement will .

16. Define the Law of Conservation of Mass:

17. Give one example of the Law of Conservation of Mass. (use an example from the text or one we discussed in class)