Unit Test — Unit test Answers

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1
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Which statement best relates science and societal problems?

A
Societal problems are the result of science.
B
Any societal problem can be solved by using science.
C
A scientific solution to a societal problem does not result in further problems.
D
Science can be used to address societal problems, but it is not always successful.
2
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Which could result from a person who does not finish the prescribed amount of antibiotics for an infection?

A
health-code violations
B
food-borne illnesses
C
antibiotic-resistant bacteria
D
faster-acting antibiotics
3

How does the washing of hands help prevent a societal problem?

A
It keeps water supplies clean.
B
It helps treat inherited disease.
C
It helps protect the environment.
D
It reduces the spread of disease.
6

How can irradiation solve a societal problem?

A
It can improve medicines.
B
It can treat inherited diseases.
C
It can protect the environment.
D
It can prevent food-borne diseases.
7

How did improving treatment of patients with antibiotics lead to a new problem?

A
Antibiotics began to cause habitat destruction.
B
Some food sources were contaminated by antibiotics.
C
Some pathogens became resistant to antibiotics.
D
Antibiotics began to interfere with the treatment of inherited diseases.
8

How did Alexander Fleming’s research solve a societal problem?

A
He developed ways to treat inherited diseases.
B
He advocated for regular hand washing to kill germs.
C
He discovered a new type of medicine that could treat infections.
D
He discovered the cause of mad cow disease, an emerging disease.
9

Which statement correctly relates science and its influence on society?

A
Science can neither solve societal problems nor influence societal decisions.
B
Science can solve societal problems, and it can affect societal decisions.
C
Science cannot solve societal problems, but it can influence societal decisions.
D
Science can solve societal problems, but it does not influence societal decisions.
10

Which societal problem can be solved, in part, by scientists identifying areas of high biodiversity?

A
reducing the amount of pollution
B
finding affordable housing
C
protecting the environment
D
providing access to clean water
12

Why do new scientific discoveries or technological developments often lead to new career opportunities?

A
They can lead to new branches of science and technology.
B
They require special government agencies to regulate their use.
C
They are specifically developed to create new career opportunities.
D
They cause older branches of science to become obsolete.
13

A hypothesis must be

A
testable.
B
repeatable.
C
written.
D
supported.
14

Read the passage about bird food and bird watching. Noted scientist Dr. Elsa Birde described the effect of adding a mixture of dried apples and raisins to the previous feed of sunflower seeds, millet, thistle seed, and cracked corn in bird feeders in her yard. Over three years, Dr. Birde observed that the new mixture increased the number of songbirds at her feeders, especially during the months of April and May. As she has done for several years, Dr. Birde recorded, at the same time each day, the number of birds at each of her four feeders. She noted that the third year using the mixture coincided with the largest increase. There was a twenty-five percent increase in the number of songbirds over times when this mixture was not used. Dr. Birde also noted that in the third year she used a specific ratio of the ingredients, carefully measuring, which she had not done in previous years. The third year also had a warmer than normal spring, and a construction project began in a neighborhood near Dr. Birde’s. Dr. Birde is now going to produce this formula for sale and advertise to customers that they may see the same twenty-five percent increase in songbirds at their feeders.Dr. E. Birde, Journal of Scientific Bird FeedingWhich scientific claim can be made?

A
Songbird numbers will increase due to the effects of climate change increasing global temperatures.
B
Songbirds appear more often in April and May.
C
With an increase in construction, songbirds will move from one neighborhood to another.
D
A study by Dr. Birde showed that the number of songbirds in her yard increased due to a modified food source.
15

Which type of information is best represented by a chart?

A
the sequence of chemical reactions in photosynthesis
B
the percentage composition of gases in car exhaust
C
the rate of carbon dioxide production during exercise
D
the numbers of male and female fish in a lake
16

Ideas about the components of cells have been affected by new technologies. Four technologies are listed below. Which one enabled researchers to understand the basis of the other three?

A
amino-acid sequencing
B
blood typing
C
DNA sequencing
D
paternity testing
17

Recently, crops of vegetables such as lettuce and green onions have been contaminated, while they are still on the farm, with bacteria that cause food poisoning. How will science influence the way the government responds to prevent an increase in food-borne diseases?

A
Because science has shown that lettuce and green onions are not nutritionally valuable, the government may pass laws that ban the sale of lettuce and green onions.
B
Because science has shown that there is no way to prevent bacterial contamination, the government may pass laws that punish businesses that buy lettuce and green onions.
C
Because science has shown that the washing of hands helps prevent the spread of infectious diseases among people, the government may pass laws that require hand washing by everyone who handles food.
D
Because science has shown there are ways to find the source of the contamination, the government may pass laws that require farm practices that reduce the contamination of lettuce and green onions.
19

A scientist designed and conducted an experiment to test a hypothesis, and then formed a conclusion from her results. Next, she collected and analyzed more data and formed another conclusion. Which statement best justifies the fact that she skipped the hypothesis and experimental design steps of the scientific method?

A
The scientist must have realized that she performed one of the steps incorrectly.
B
The scientist was unhappy with the first data set and started the experiment over.
C
The scientist was repeating the experiment to improve the validity of her data.
D
The scientist was planning to form a hypothesis after completing the experiment.
20

Ali hypothesized that increasing fertilizer would increase plant growth. Four groups of thirty similar plants were given 0 to 15 ml of fertilizer, as shown in the graph. The change in plant height for each group over a two-week period was averaged and recorded.Plant GroupFertilizer Added (mL)Avg. Growth (cm)A04B56C108D153What is the best conclusion based on this data?

A
The hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth.
B
The hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant.
C
The hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth.
D
The hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.

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