7th grade integrated science Standard I, Objective 2
Multiple Choice
- Which would you use to determine the mass of an object?
A. Meter stick
B. Graduated cylinder
C. Bathroom scale
D. Triple beam balance
a2. Which would you use to find the volume of a rectangular cube?
A. Meter stick
B. Graduated cylinder
C. Bathroom scale
D. Triple beam balance
a3. Which would you use to find the volume of an irregularly shaped rock?
A. length x width x height
B. water displacement
C. direct measurement
D. a triple beam balance
- What is the volume of this cube?
A. 9 cm²
B. 12 cm³
C. 24 cm³
D. 36 cm³
a5. A rock is dropped into a graduated cylinder containing 40 mL of water. The new volume is 47 mL. What is the volume of the rock?
A. 4 mL
B. 7 mL
C. 47 mL
D. 87 mL
a6. What is the mass of an object with the balance at these settings?
0 100 200 300 400 500
0 10 20 30 40 50 60 70 80 90 100
0 1 2 3 4 5 6 7 8 9 10
A. 175 g
B. 165.7 g
C. 175.8 g
D. 176.0 g
a7. What is the volume of the liquid in this graduated cylinder?
A. 30 mL
B. 32 mL
C. 34 g
D. 40 mL
Use the illustration on the right to answer the next two
questions. It shows the densities of some common
substances. The black cube is made of plastic.
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b8. Which substance is most dense?
A. black cube
B. alcohol
C. water
D. corn syrup
b9. What do you know about the density of the black cube?
A. it is less dense than the alcohol and the water
B. it is more dense than the corn syrup and the water
C. it is more dense than the water and less than the corn syrup.
D. it is more dense than the corn syrup and less dense than the alcohol.
Picture A shows an egg in fresh water and picture B shows
an egg in salt water. Use this data to answer the next two questions.
A B
b10. Why does the egg sink in fresh water? The egg is
A. less dense than the fresh water
B. more dense than the fresh water
C. more dense than the salt water
D. the same density as both types of water
- Based on the eggs, why is it easier to float on the Great Salt Lake than a fresh water lake? Your body is
A. less dense than the lake water
B. more dense than the lake water
C. the same density as the lake water
D. warmer than the lake water
- Why does ice float on water?
A. it is colder than water
B. it is less dense than water
C. it is harder than water
D. it is lighter than water
- Which is the correct formula for density?
A. Volume times mass
B. Mass times weight
C. Volume divided by mass
D. Mass divided by volume
- If the mass of a cube were 48 g, and its volume 24 cm3, what would its density be?
A. .5 g/ cm3
B. 2 g/ cm3
C. 4 g/cm3
D. 6 g/cm3
c15. 90 mL of salt water has a mass of 120 g. What is the density of the salt water?
A. .75 g/mL
B. 1.3 g/mL
C. 3.0 g/mL
D. 9.0 g/mL
d16. Which of the following statements best summarizes the relationship between mass, volume and density.
A. Density is the amount of mass in a certain volume of matter.
B. Density is the heaviness of an object for its weight.
C. Density is the size of an object for its volume.
D. Density is the mass added to the volume of an object.
d17. If each dot in the cube is a particle of with the same mass, which cube has the greatest density and why?
A B C D
A. A, it has the fewest particles for the volume of the cube.
B. B, it has the most particles for the volume of the cube.
C. C, it has the greatest volume for the mass of the cube.
D. D, it has the most particles for the volume of the cube.
d18. A student lifts two soup cans that are the same size. He says that one is heavier than the other. What do you know about the heavier can?
A. it has more volume than the lighter one
B. it has more mass per unit volume
C. it has larger chunks of vegetables in it
D. it is less dense than the lighter one
Use the descriptions of two different experiments to answer the next three questions:
Experiment X Experiment Y
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e19. What would be the best title for these experiments?
A. Foiled Again, the Gases Escaped
B. How to Measure a Gas
C. Finding the Density of A Gas
D. What About Gasses?
e20. Which experiment used the scientific method?
A. X, there were fewer steps
B. X, it used more accurate equipment
C. Y, it used the correct formulas
D. X and Y both used the scientific method
e21. What would you expect the results of the two experiments to show?
A. The density of a gas is very small.
B. Gases are very dense.
C. Gases cannot be measured.
D. One gas will be a darker color than the other.
Answers:
1. D
2. A
3. B
4. C
5. B
6. C
7. B
8. D
9. C
10. B
11. A
12. B
13. D
14. B
15. B
16. A
17. D
18. B
19. B
20. D
21. A
Essay
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Look closely at the illustration. Use it to answer the next
four questions. It shows the densities of some common
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substances. If this illustration represented a small
portion of the ocean, what would happen if an oil
tanker ran aground and spilled oil?
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- Why does the oil pose a danger?
- Is the danger greater to birds and seals
or to fish and other organisms that live on the
ocean floor? Why?
- If the clean up begins immediately, how is the density of the oil an advantage for the clean up crew?
- The oil in a spill with combine with water in a few days and sink to the bottom. How has the water affected the density of the oil?
5. How would sinking oil affect the clean up?
Sample Answers:
1. It will stay on the surface and birds and seals will be covered with it, eat it (as they try to clean their fur)
2. Because marine mammals and birds live on the surface, they are more likely be damaged than fish swimming underneath. Marine birds are also at greater risk of harm than fish because they land and float on the surface.
3. Because the oil that floats on water is much easier to clean up than if it were to sink to the bottom.
4. The oil has become more dense.
5. If oil sank to the bottom it would be harder to clean up.