Unit 4 Review
DePersio’s Discovery Lab
Unit 4 Review
A solution is formed when one substance is dissolved in another. Mae has a solution in which
water is the solvent. Which of these could be the solute?
A
B
C
D
Oil
Pebbles
Sand
Sugar
Unit 4 Review
Jose has 5g of salt and 10mL of water. He pours the water into a beaker and then adds the salt
and watches it dissolve. Which word best describes the water?
A
B
C
D
Mixture
Solute
Solution
Solvent
Unit 4 Review
Emily made flow charts to show the changes in states of water. In each, she listed the original
state, the process that results in a change in state, and the resulting state. Which of these
correctly describes a change in state of water?
A
B
C
D
Liquid water ® melts ® solid water
Liquid water ® boils ® water vapor
Solid water ® condenses ® liquid water
Water vapor ® evaporates ® liquid water
Unit 4 Review
There are three main states of matter: liquid, solid, and gas. Which statement describes the
shape of a solid?
A
B
C
D
It has its own shape.
It does not have shape.
It takes the shape of its container.
It changes shape with temperature.
Unit 4 Review
There are different characteristics for each of the states of matter. Which statement describes
a difference between liquids and solids?
A
B
C
D
Temperature can change a solid to a liquid, but it cannot change a liquid to a solid
Solids have a definite volume and liquids do not have a definite volume
The particles in a solid are much closer together than the particles in a liquid
Solids take on the shape of their containers and liquids maintain their own shapes
Unit 4 Review
Jakob studied drawings of the particles in the same substance. The drawings show the
substance in different states and temperatures. Which drawing most likely shows the
substance at the highest temperature?
A
B
C
Unit 4 Review
Soryana’s teacher gave her a test tube of liquid. Which tool should Soryana use to measure
the volume of the liquid?
A
B
C
D
Balance
Graduated Cylinder
Test Tube
None of the above
Unit 4 Review
Water can be a liquid, solid, or gas. The pictures show how it changes from each state of
matter. What process takes place when matter changes from state 1 to state 3?
A
B
C
D
Boiling
Condensing
Freezing
Melting
Unit 4 Review
Soryana’s teacher gave her a test tube of liquid. Which tool should Soryana use to measure
the volume of the liquid?
A
B
C
D
Divide the volume by the mass
Divide the mass by the volume
Multiply the volume by the mass
Add the mass and volume and divide by 2
Unit 4 Review
The table gives the mass and volume of four unknown solids.
Sample
1
2
3
4
Mass (g)
125
324
234
540
Volume (mL)
3
9
2
8
Which is the correct explanation of how to find the density?
A
B
C
D
Divide the volume by the mass
Divide the mass by the volume
Multiply the volume by the mass
Add the mass and volume and divide by 2
Density
Unit 4 Review
Matter may be a gas, solid, or liquid. It can change from one state to another. Which change
most often causes matter to change state?
A
B
C
D
Change in mass
Change in
Change in volume
Change in temperature
Unit 4 Review
Each of the states of matter has specific characteristics. Which statement correctly describes
one of these characteristics?
A
B
C
D
Solids flow from one place to another.
Gases can expand and be compressed.
Liquids have definite volume and shape.
The particles in solids have weak forces of attraction.
Unit 4 Review
Randall experimented with an unknown liquid. The table shows what happened when he
changed the temperature of the liquid.
Action taken
Left at room temperature (25 °C)
Placed in freezer set to –10 °C
Heated to 85 °C
Change in substance
No change, substance remained a liquid
No change, substance remained a liquid
Substance became a gas
Which statement is supported by Randall’s experiments?
A
B
C
D
The substance boils at 85 °C.
The substance freezes at 25 °C.
The substance condenses at –10 °C.
The substance changes state at –10 °C.
Unit 4 Review
Riley and Jill are studying what happens to matter when it changes state. They found this list
of statements. Which of these statements is true?
A When matter changes state, new matter may be created.
B When matter changes state, it is still the same type of matter.
C When matter changes state, its boiling point might also change.
D When matter changes state, the space between particles in the matter stays the
same.
Unit 4 Review
Lina needs to make a list of the physical properties of matter. Which of these should Lina
include in her list?
A
B
C
D
Balance
Graduated cylinder
Temperature
Thermometer
Unit 4 Review
Each state of matter has certain physical properties. Which is a physical property of a gas?
A
B
C
D
It has definite shape.
It can be compressed.
It has definite texture.
Its particles vibrate in place.
Unit 4 Review
During an experiment, Carlos heated a beaker of water over a hot plate burner. After a period
of time, the beaker was empty. Which statement describes what happened?
A
B
C
D
The water froze.
The water melted.
The water condensed.
The water evaporated
evaporated.
Unit 4 Review
Helen is studying the properties of solids. She is comparing the wooden cube and the steel
cube shown in the picture below.
Which property is the same for the two cubes?
A
B
C
D
Color
Luster
Texture
Volume
Unit 4 Review
At what temperatures is water a gas?
A
B
C
D
Below 0 °C
Above 100 °C
Between 0 °C and 100 °C
Between 0 °C and 120 °C
Unit 4 Review
The table shows the melting points and boiling points for different substances.
Suppose these substances were placed in a freezer set to –50 °C. Which substance would
become a liquid?
A
B
C
D
Chlorine
Mercury
Oxygen
Tungsten
Unit 4 Review
Wilson made a list of activities that involve a chemical change. Which of these changes
should be included on his list?
A
B
C
D
Ringing a bell
Making ice cubes
Picking up rocks
Making pancakes
Unit 4 Review
Jo made a table of chemical changes and physical changes.
Which is in the wrong column?
A
B
C
D
Sharpening a pencil
Baking a loaf of bread
Pouring milk into a glass
Crumpling aluminum foil into a ball
Unit 4 Review
Which of the following represents a physical change?
A
B
C
D
Unit 4 Review
Ava performed an investigation. Then, Matthew repeated the same investigation. What is the
best reason for Matthew to repeat it?
A
B
C
D
To write the same report
To practice the experiment
To come to the same conclusion
To be sure the observations are accurate
Unit 4 Review
Taylor put the same amounts of water, sugar, and yeast into three balloons. Then she put each
one in a place with a different temperature and observed the changes. If someone wanted to
replicate Taylor’s experiment, what other information would they need?
A
B
C
D
The mass of each balloon and what was in it
The temperature where each balloon was placed
The size of the table where each balloon was placed
The total mass of all the balloons and what was in them
Unit 4 Review
Andrea created a solution by adding food coloring to water. Her solution is also a mixture.
Which of these is true of all solutions?
A
B
C
D
They are all liquids
They all include water
The parts of all solutions are evenly mixed
The substances are always permanently combined
Unit 4 Review
Heidi combined lettuce, tomatoes, cucumbers, and shredded cheese to make a salad. Which
best describes what Heidi made?
A
B
C
D
Combination
Element
Mixture
Solution
Unit 4 Review
A company collects cans for recycling. Some cans are made of aluminum, and others are
made of steel. Which of the following is the best way to separate the mixture of the two types
of cans?
A
B
C
D
By size
By shape
By magnetism
By evaporation
Unit 4 Review
Destiny is making a nutrient solution to use in her garden. She places the powder in a
watering can. Then she adds the water. Which would dissolve the powder fastest?
A
B
C
D
Shaking the can vigorously
Stirring the solution slowly
Tilting the can carefully from side to side
Setting the can down and leaving it alone
Unit 4 Review
Atoms are made up of smaller particles called subatomic particles. Which is a subatomic
particle that has no charge?
A
B
C
D
Electron
Neutron
Nucleus
Proton
Unit 4 Review
Jacob put yeast into a bowl of water and added a little sugar. He put the bowl in a warm
place. After a while, Jacob observed foam spilling out of the bowl. What kind of change is
occurring?
A
B
C
D
Physical change
Chemical change
Scientific change
Geological change
Unit 4 Review
Which of these conditions has the greatest effect on how quickly a substance changes from
one state to another?
A
B
C
D
Color
Light
Share
Temperature
Unit 4 Review
Why does milk have to be kept in a refrigerator?
A
B
C
D
Milk tastes better when it is cold
The reactions that cause milk to spoil are slower at lower temperatures
Physical changes that cause milk to spoil are slower at lower temperatures
No chemical or physical changes can occur at cool temperatures
Unit 4 Review
Felix is helping his father cook dinner.
After Felix adds salt to the boiling water, what will he have in the pot?
A
B
C
D
A mixture call a solution
A solution called a mixture
A mixture called a combination
A solution called a combination
Unit 4 Review
Tania's mom boils water in a pot on the stove to make soup. Which of these ingredients will
dissolve in the water?
A
B
C
D
Garlic
Oil
Pepper
Salt
Unit 4 Review
Each state of matter has certain physical properties. Which is a physical property of a gas?
A
B
C
D
It has definite shape
It can be compressed
It has definite texture
Its particles vibrate in place
Unit 4 Review
Different elements have different kinds of atoms. How can you tell an atom of one element
from an atom of another?
A
B
C
D
The number of electrons
The number of neutrons
The number of nuclei
The number of protons
Unit 4 Review
The change in matter in which chemical bonds are broken, rearranged, and reformed is called
a _____.
A
B
C
D
Chemical formula
Chemical reaction
Chemical equation
Chemical compound
Unit 4 Review
The metric system is a system of measurement used in science and throughout the world to
measure matter.
A True
B False
Unit 4 Review
In which three forms can matter be found?
A
B
C
D
Loud, Soft, Low
Hot, Warm, Cold
Solid, Liquid, Gas
Hard, Soft, Rough
Unit 4 Review
What is a measurement of the energy or heat in matter?
A
B
C
D
Size
Weight
Density
Temperature
Unit 4 Review
Which is the BEST example of a physical change in matter?
A
B
C
D
Firecracker exploding
Log burning
An ice cube melting
A flashlight turning on
Unit 4 Review
In a solution, the particles of different substances are _____ .
A
B
C
D
Never mixed
Mixed evenly
Mixed unevenly
Separated from each other
Unit 4 Review
When you shake a mixture of sand and water, you have made a(n) _____.
A
B
C
D
Soap
Colloid
Emulsion
Suspension
Unit 4 Review
Which of the following is NOT a mixture?
A
B
C
D
Table salt
Lemonade
Garden soil
Salad dressing
Unit 4 Review
What is volume?
A
B
C
D
The amount of space something takes up
The amount of mass in something
The amount of weight in an object
The amount of gravity pulling on an object
Unit 4 Review
When a substance changes phase, the chemical structure of its molecules does not change.
A True
B False