1. Unit 4 Test Review

2. At what temperatures is water a gas?
below 0 degrees C
above 100 degrees C
between 0 degrees C and 100 degrees C
between 0 degrees C and 120 degrees C

3. At what temperatures is water a gas?
below 0 degrees C
above 100 degrees C
between 0 degrees C and 100 degrees C
between 0 degrees C and 120 degrees C

4. Study the following diagram. What word belongs on arrow 2?
condensation
freezing
evaporation
melting

5. Study the following diagram. What word belongs on arrow 2?
condensation
freezing
evaporation
melting

6. Jakob studied drawings of the particles in the same substance
Jakob studied drawings of the particles in the same substance. The drawings show the substance in different states and temperatures. Which shows the substance at the highest temperature? C. D.

7. Jakob studied drawings of the particles in the same substance
Jakob studied drawings of the particles in the same substance. The drawings show the substance in different states and temperatures. Which shows the substance at the highest temperature? C. D.

8. Matter may be a gas, solid, or liquid
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?
change in mass
change in color
change in volume
change in temperature

9. Matter may be a gas, solid, or liquid
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?
change in mass
change in color
change in volume
change in temperature

10. Micah placed a beaker of water on a hot plate
Micah placed a beaker of water on a hot plate. When bubbles started forming in the water, he made the first sketch. After 5 min, he made the second sketch. What happened during the 5 min that Micah was observing the beaker of water?
Water was changed into energy during a chemical change.
Water was changed into a different state during a physical change.
Water was changed into a different material during a physical change.
Water was changed into a different material during a chemical change.

11. Micah placed a beaker of water on a hot plate
Micah placed a beaker of water on a hot plate. When bubbles started forming in the water, he made the first sketch. After 5 min, he made the second sketch. What happened during the 5 min that Micah was observing the beaker of water?
Water was changed into energy during a chemical change.
Water was changed into a different state during a physical change.
Water was changed into a different material during a physical change.
Water was changed into a different material during a chemical change.

12. Wilson made a list of activities that involve a chemical change
Wilson made a list of activities that involve a chemical change. Which of these changes should be included on his list?
ringing a bell
making ice cubes
picking up rocks
making pancakes

13. Wilson made a list of activities that involve a chemical change
Wilson made a list of activities that involve a chemical change. Which of these changes should be included on his list?
ringing a bell
making ice cubes
picking up rocks
making pancakes

14. The rails on a railroad track have small gaps between sections of metal rails. Why are these gaps needed?
They allow the metal to expand when it is heated without bending the rails.
They allow the metal to expand when it is cooled without bending the rails.
They keep the rails from touching and reacting with one another.
They help chemical reactions between the rails and air happen faster.

15. The rails on a railroad track have small gaps between sections of metal rails. Why are these gaps needed?
They allow the metal to expand when it is heated without bending the rails.
They allow the metal to expand when it is cooled without bending the rails.
They keep the rails from touching and reacting with one another.
They help chemical reactions between the rails and air happen faster.

16. Two balloons contain the same amounts of water, sugar, and yeast
Two balloons contain the same amounts of water, sugar, and yeast. Two other balloons contain the same amount of water, but have no sugar or yeast. The following picture shows the balloons Which balloon would you predict will get bigger the fastest?
Balloon 1 C. Balloon 3
Balloon 2 D. Balloon 4

17. Two balloons contain the same amounts of water, sugar, and yeast
Two balloons contain the same amounts of water, sugar, and yeast. Two other balloons contain the same amount of water, but have no sugar or yeast. The following picture shows the balloons Which balloon would you predict will get bigger the fastest?
Balloon 1 C. Balloon 3
Balloon 2 D. Balloon 4

18. William had four balloons with the same amounts of water, sugar, and yeast in them. He kept each balloon at a different temperature for 2 hours. Then he measured the circumference of each balloon. The bar graph shows William’s measurements. Which temperature had the greatest effect on the circumference of the balloons?
10 °C C. 29 °C
24 °C D. 35 °C

19. William had four balloons with the same amounts of water, sugar, and yeast in them. He kept each balloon at a different temperature for 2 hours. Then he measured the circumference of each balloon. The bar graph shows William’s measurements. Which temperature had the greatest effect on the circumference of the balloons?
10 °C C. 29 °C
24 °C D. 35 °C

20. Andrea created a solution by adding food coloring to water
Andrea created a solution by adding food coloring to water. Her solution is also a mixture. Which of these is true of all solutions?
They are all liquids.
They all include water.
The parts of all solutions are evenly mixed.
The substances are always permanently combined.

21. Andrea created a solution by adding food coloring to water
Andrea created a solution by adding food coloring to water. Her solution is also a mixture. Which of these is true of all solutions?
They are all liquids.
They all include water.
The parts of all solutions are evenly mixed.
The substances are always permanently combined.

22. The pot contains a mixture
The pot contains a mixture. The method shown in the picture can be used to separate what type of mixture?
a solution, such as salt water
a mixture of particles with different densities
a mixture of particles of different sizes, such as seashells and sand
a mixture of steel, which is magnetic, and aluminum, which is not magnetic

23. The pot contains a mixture
The pot contains a mixture. The method shown in the picture can be used to separate what type of mixture?
a solution, such as salt water
a mixture of particles with different densities
a mixture of particles of different sizes, such as seashells and sand
a mixture of steel, which is magnetic, and aluminum, which is not magnetic

24. Deshawn has to dissolve salt crystals in the water
Deshawn has to dissolve salt crystals in the water. What would be the best thing to do to help the crystals dissolve quickly?
heat the salt crystals
crush the salt crystals
cool the water in the tank
use the largest salt crystals

25. Deshawn has to dissolve salt crystals in the water
Deshawn has to dissolve salt crystals in the water. What would be the best thing to do to help the crystals dissolve quickly?
heat the salt crystals
crush the salt crystals
cool the water in the tank
use the largest salt crystals

26. Four students each added salt crystals to water and measured the time it took for all the crystals to dissolve. The following table shows their results. Athena repeated the investigation using water heated to 40ºc. Which is the time most likely measured by Athena?
10 sec C. 30 sec
20 sec D. 50 sec

27. Four students each added salt crystals to water and measured the time it took for all the crystals to dissolve. The following table shows their results. Athena repeated the investigation using water heated to 40ºc. Which is the time most likely measured by Athena?
10 sec C. 30 sec
20 sec D. 50 sec

28. Destiny is making a nutrient solution to use in her garden
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?
shaking the can vigorously
stirring the solution slowly
tilting the can carefully from side to side
setting the can down and leaving it alone

29. Destiny is making a nutrient solution to use in her garden
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?
shaking the can vigorously
stirring the solution slowly
tilting the can carefully from side to side
setting the can down and leaving it alone

30. Atoms are made up of smaller particles called subatomic particles
Atoms are made up of smaller particles called subatomic particles. Which is a subatomic particle that has no charge?
electron
nucleus
neutron
proton

31. Atoms are made up of smaller particles called subatomic particles
Atoms are made up of smaller particles called subatomic particles. Which is a subatomic particle that has no charge?
electron
nucleus
neutron
proton

32. The following table describes four different atoms. Which is true?
Each atom is a different element.
Only atoms 3 and 4 are the same element.
Atom 3 is a different element from all the others.
Atom 4 is a different element from all the others.

33. The following table describes four different atoms. Which is true?
Each atom is a different element.
Only atoms 3 and 4 are the same element.
Atom 3 is a different element from all the others.
Atom 4 is a different element from all the others.