PARTICLE POWER
What is matter made of?
Particles
Which state of matter keeps its own shape?
Solid
What is the change from a solid to a liquid called?
Melting
Complete the statement:
Matter cannot be ________ or ________.
Created or destroyed
Two objects are the same color, but only one is attracted to a magnet.
What physical property could scientists use to tell them apart?
Magnetism
True or False: The particles that make up matter can be seen with the naked eye.
False
Which state of matter has a definite volume but no definite shape?
Liquid
What is the change from a liquid to a solid called?
Freezing
A substance weighs 46 g before freezing.
If no matter enters or leaves the system, how much should it weigh after freezing?
46 g
Salt is stirred into water until it can no longer be seen.
What happened to the salt?
A. It disappeared.
B. It dissolved.
C. It was destroyed.
D. It turned into water.
B. It dissolved.
A student heats a cup of water. What happens to the movement of the water particles?
A. They move faster.
B. They move slower.
C. They stop moving.
D. They disappear.
A. They move faster.
Which state of matter has no definite shape and spreads out to fill its container?
Gas
What is the change from a liquid to a gas called?
Evaporation
A student mixes 32 g of Substance A with 28 g of Substance B in a closed container.
What should the total weight be after mixing?
A. 4 g
B. 32 g
C. 60 g
D. 64 g
A student dissolves salt in water. Later, the water evaporates and salt crystals remain.
Which conclusion is BEST supported?
A. New salt was created.
B. The water turned into salt.
C. The salt remained present even when it could not be seen.
D. The salt disappeared and later returned.
C. The salt remained present even when it could not be seen.
Which description BEST represents particles in a gas?
A. Packed tightly together in fixed positions
B. Close together but able to move past one another
C. Spread far apart and moving freely
D. Not moving at all
C. Spread far apart and moving freely
An ice cube melts inside a cup. Which observation provides the BEST evidence that it changed from a solid to a liquid?
A. It is still cold.
B. It still has weight.
C. It now takes the shape of the cup.
D. It is still made of particles.
C. It now takes the shape of the cup.
Water droplets form on the outside of a cold cup.
Which phase change occurred?
A. Melting
B. Freezing
C. Evaporation
D. Condensation
D. Condensation
Before Melting 45 g
After Melting 45 g
Which conclusion is BEST supported by the data?
A. Matter gains weight during changes.
B. Matter loses weight during changes.
C. The total weight of matter is conserved during changes.
D. Only freezing conserves matter.
C. The total weight of matter is conserved during changes.
A student observes a piece of metal over several days. The metal changes from its original color to a reddish-brown color as rust forms.
Which statement BEST explains the observation?
A. The metal only changed size.
B. The metal melted into a different state.
C. The color change and formation of rust provide evidence that a new substance formed.
D. The metal disappeared and new matter was created.
C. The color change and formation of rust provide evidence that a new substance formed.
Sugar is stirred into water until it can no longer be seen. Which statement BEST explains what happened?
A. The sugar particles disappeared.
B. The sugar particles turned into water particles.
C. The sugar particles are still present and spread throughout the water.
D. The sugar particles were destroyed.
C. The sugar particles are still present and spread throughout the water.
Three particle models are shown:
Model A: Particles are tightly packed in an organized arrangement.
Model B: Particles are close together but able to move past one another.
Model C: Particles are spread far apart.
Model B. Liquid particles are close together but can move past one another.
A student places liquid water in a freezer.
Which statement BEST describes what happens?
A. Heat is added, particles move faster, and the water melts.
B. Heat is removed, particles move slower, and the water freezes.
C. Heat is added, particles move slower, and the water evaporates.
D. Heat is removed, particles move faster, and the water condenses.
B. Heat is removed, particles move slower, and the water freezes.
A student heats water in an open container. Some water becomes water vapor and escapes into the air.
The container weighs less afterward.
Which explanation is BEST?
A. Heating destroyed some matter.
B. Water particles stopped having weight.
C. Matter left the open system as water vapor.
D. The law of conservation no longer applies.
C. Matter left the open system as water vapor.
Question:
A drink has a total weight of 175 g.
It contains:
How many grams of water are in the drink?
A. 55 g
B. 120 g
C. 135 g
D. 230 g
B. 120 g