Download 7th Grade Science Mini-Assessment # 2

7th Grade Science
Mini-Assessment # 2
Multiple Choice
Directions: Identify the choice that best completes the statement or answers the question.
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1. Until the final years of the nineteenth century, the accepted model of the atom resembled that of a
billiard ball – a small, solid sphere. In 1897, J.J. Thomson dramatically changed the modern view of the
atom with his discovery of the electron. Thomson’s work suggested that the atom was not an
“indivisible” particle as John Dalton had suggested but a jigsaw puzzle made of smaller pieces.
Thomson’s theory came from his experiments with cathode rays produced by the Cathode Ray Tube.
From his experiment, he observed that cathode rays are deflected by magnetic and electric fields in a
manner that is identical to negatively charged material. Due to these observations, J.J. Thomson
concluded that cathode rays are negatively charged particles that are located in all atoms. When
evidence from many new experiments does not support an existing scientific theory like Dalton’s, which
of the following is most likely to happen?
Comparison of Dalton’s and Thomson’s Atomic Model
A.
B.
C.
D.
The theory will be revised.
The theory will not be affected in any way.
The new evidence will be changed to support the theory.
New experiments will be conducted until evidence supporting the theory is obtained
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2. The Law of Conservation of Mass states that matter cannot be created or destroyed but transferred. This
law was proven by Antoine Lavoisier, who heated various substances and documented quantitative
relationships. His observations proved that the mass of the reactants is equal to the mass of the product
in a chemical reaction. Justify why Lavoisier’s conclusions were considered a law instead of a theory.
A.
B.
C.
D.
Lavoisier attempted to explain the results of his experiments.
Lavoisier provided sufficient empirical evidence to support his claim.
Lavoisier provided a correct explanation of an observed pattern in nature.
Lavoisier applied the results of one experiment to explain a wide variety of circumstances.
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3. A timeline of some contributions made by scientist throughout history is shown below. These
discoveries have contributed to the formation of the Cell Theory.
Which statement best summarizes the development of the Cell Theory over time?
A.
B.
C.
D.
The discovery of new evidence resulted in changes to the cell theory.
Advancements in cellular models proved the cell theory was accurate.
The cell theory was modified with the discovery of every new organism.
Changes in cellular models showed that the cell theory was based on opinion.
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4. The diagram above shows a colony of prokaryotes, and a single-celled eukaryote. The eukaryote
contains organelles that resemble the three types of bacteria that are found in the prokaryotes. More
than a billion years ago, bacteria like these may have joined with prokaryotes to form cells. Researchers
think that these once free-living prokaryotes became the organelles of the modern day eukaryotes.
Which portion of the cell theory does this explain?
A.
B.
C.
D.
All organisms have organelles.
All cells are made up of bacteria.
All organisms are composed of cells.
All cells come from pre-existing cells.
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5. The Cell Theory applies to all organisms including the five shown below.
Which of the following statements describes how these organisms are an example of the cell theory?
A.
B.
C.
D.
The organisms have cells that lack a nucleus.
The organisms are made of one or more cells.
The cells of the organisms undergo photosynthesis.
The cells of the organisms are identical to each other.
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6. The hierarchy of the body is shown below.
Which of the following statements is NOT part of the cell theory?
A.
B.
C.
D.
Cells come from pre-existing cells
Cells are the basic unit of life.
Cells are made of molecules.
Cells make up all organisms.
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7. The temperature of a cell’s environment increases by 5˚C. If the cell is to maintain homeostasis, what
must happen?
A.
B.
C.
D.
The cell must maintain its internal temperature.
The cell must increase its internal temperature by 5 ˚C.
The cell must decrease its internal temperature by 5 ˚C.
The cell must absorb heat from the environment to reset the temperature.
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8. During cellular respiration, cells break down sugars to release energy. In this process, water and carbon
dioxide are produced as waste products. What must happen to these waste products in order for a cell to
maintain homeostasis?
A.
B.
C.
D.
They must be excreted from the cell.
They must be used for photosynthesis.
They must be digested and used as food.
They must be permanently stored inside the cell.
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9. Organs are made up of vast numbers of cells that perform various tasks. When cells die within an organ,
homeostasis is interrupted. What will most likely happen so that homeostasis can be maintained?
A.
B.
C.
D.
The organ will continue to work, but with decreased function.
The organ will immediately shut down so that no further damage will occur.
The remaining cells will be unable to divide and the organ will quit working.
The remaining cells will reproduce in order to replace the ones that have died.
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10. How does the cell membrane aid the cell in maintaining homeostasis?
A.
B.
C.
D.
The cell membrane controls all cellular activities in response to changes in the external environment.
The cell membrane uses energy to remove waste products from the cell through sac-like packages.
The cell membrane assists with maintaining the correct temperature by absorbing energy.
The cell membrane extracts energy from food when the cell is low on energy.
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7th Grade Mini-Assessment #2 Version A Answer Key
Answer
Benchmark
Correct Answer
DOK
1.
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A
3
2.
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B
3
3.
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A
3
4.
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D
2
5.
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B
2
6.
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C
2
7.
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A
2
8.
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A
2
9.
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D
2
10.
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B
2
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