Matter test study guide
An artist heats a solid copper rod and bends it into a new shape. What happens to the
copper atoms as the temperature of the solid copper rod increases?
A. The copper atoms move more slowly after being heated.
B. The copper atoms move more quickly after being heated.
C. The copper atoms were not moving before they were heated, and they are not moving
after being heated.
D. The copper atoms were moving before they were heated, and they continue to move at
the same speed after being heated.
Helium gas is used in balloons. When helium gas is cooled enough, it becomes a liquid.
What do you think happens when helium turns into a liquid?
A. The helium has turned into water.
B. The helium has turned into a different liquid.
C. Some helium has turned into water, some into another liquid and the rest is helium.
D. It is all still helium, but in a liquid form.
A student mixed 125 grams of sugar, 250 grams of water, and 5 grams of flavoring. The
solution weighs:
A. 250 grams
B. 375 grams
C. 380 grams
D. 400 Grams
Which is an example of condensation?
A. 12 inches of snow fall on December 12th.
B. On a hot day, water on the sidewalk quickly disappears.
C. During a hurricane, 3 inches of rain fall in an hour.
D. A layer of water appears on the outside of a cup of ice water soon after it was poured.
How do water molecules in ice move differently than the molecules in liquid water?
Sarah and Jake were each given a ball of clay of the same mass. Both students used all of
their clay to make an object. Sarah rolled her clay into a ball, and Jake made a long
skinny rope. What is the mass of the clay figures after Sarah and Jake changed them?
Choose 3 phase changes below, and give an example of each. Cross out the ones you
don’t use.
Phase Change
Vocabulary word that means the
Example
phase change listed on the left
Solid to Liquid
Solid to Gas
Liquid to Solid
Liquid to Gas
Gas to Solid
Gas to Liquid
Ice melting into water takes/ releases (circle one) energy. Why?
Compare the densities of “SCIENCE COINS” to the densities of known metals. Use the
information to determine what the coins are mostly made of. Density = mass / volume
(Density = mass divided by volume)
● What is each coin made of, and how do you know?
SHOW
YOUR WORK!
Coins
Mass (g)
Volume (ml)
Butterfly
4.5 g
0.5 ml
Fish
12.0 g
4 ml
Lizard
10.5 g
0.5 ml
● Using the particle model, draw a picture of the differences between the
densities of the fish coin and the lizard coin. How are the particles
arranged in each of the coins?
Density of Known Metals:
Metal
Density (g/ml)
Aluminum
3.0 g/ml
Nickel
9.0 g/ml
Silver
11.0 g/ml
Gold
19.0 g/ml
Iron
8.0 g/ml
Platinum
21.0 g/ml
How would you know that a certain liquid was actually a melted solid of the same
substance?
When wood burns, a small amount of ash is made. Why is the mass of the wood before
the fire not equal to the mass of the ash after the reaction?
Keeping in mind the particle model of matter, explain what is happening to the air
and water particles between 1 am and 6pm on the graphs.
A student fills a beaker with 50 ml of cold water and another beaker with 50 ml of
hot water. The student then adds 1 drop of food coloring to each beaker. How do the
particles of hot water and cold water interact with the particles of food coloring and
WHY? (Remember, the hot and cold water are in their own beakers)
You are given a beaker with salt and water. There is already some salt dissolved in
the beaker, you continue to add salt, but at a certain point the salt stops dissolving.
WHY has the salt stopped dissolving? Draw and/or explain your answer in the
box below.
How does the conservation of mass apply to CHEMICAL REACTIONS? For example:
2 H2 + O2 → 2H2O
What is the relationship between heat and motion of particles in the water cycle?
Can you use the particle theory to describe the water cycle?