A farmer wants to test the affects of a pesticide on his peach crop yield, so he sprays an orchard with the pesticide treatment. A second orchard does not receive the pesticide. In the fall, the number of peaches harvested from each orchard is counted. Which of the following is the independent (manipulated) variable in the experiment?(1 point)
Responses
the pesticide
the pesticide
the second orchard
the second orchard
the first orchard
the first orchard
the number of peaches
The independent (manipulated) variable in the experiment is the pesticide.
A theory(1 point)
Responses
is always true.
is always true.
may be revised or replaced.
may be revised or replaced.
is a problem to be solved.
is a problem to be solved.
is the opening statement of an experiment.
A theory may be revised or replaced.
Which of the following is not included in the design of an laboratory experiment?(1 point)
Responses
Materials used
Materials used
Problem statement
Problem statement
Procedure
Procedure
Conclusion
Problem statement is not typically included in the design of a laboratory experiment. The design of an experiment usually includes materials used, procedure, and conclusion.
Scientists form hypotheses from which of the following?(1 point)
Responses
prior knowledge.
prior knowledge.
logical inferences.
logical inferences.
informed, creative imagination.
informed, creative imagination.
all of the above
all of the above
Scientists form hypotheses from all of the above- prior knowledge, logical inferences, and informed, creative imagination.
scientist finds that her hypothesis is not supported by the data she gathered as a result of her experiment. What conclusion can she reach?(1 point)
Responses
The data are incorrect.
The data are incorrect.
The hypothesis is wrong.
The hypothesis is wrong.
The data do not support the hypothesis.
The data do not support the hypothesis.
Her observations were biased.
The conclusion that can be reached is that the data do not support the hypothesis.
[This iYou suggest that the absence of water could slow the growth of mold on bread slices. This is a(an)
s the stem.](1 point)
Responses
experiment.
experiment.
hypothesis.
hypothesis.
conclusion.
conclusion.
analysis.
The statement "You suggest that the absence of water could slow the growth of mold on bread slices" is a hypothesis.
When/where are safety procedures important?(1 point)
Responses
in a laboratory.
in a laboratory.
in the field.
in the field.
with animals.
with animals.
all of the above
Safety procedures are important in all of the above situations- in a laboratory, in the field, and with animals.
A student getting a degree in environmental science performed a study to determine how the rate of photosynthetic activity in a local pond changed over the course of a year. The results are shown in the graph below.
Which conclusion is best supported by the evidence?
(1 point)
Responses
The rate of photosynthesis was greatest during the months of May through July
The rate of photosynthesis was greatest during the months of May through July
Photosynthetic organisms were dormant during the months of April through August
Photosynthetic organisms were dormant during the months of April through August
The rate of photosynthesis increased from June through December
The rate of photosynthesis increased from June through December
Photosynthetic organisms experienced die-off during the months of January through June.
The best conclusion supported by the evidence is that the rate of photosynthesis was greatest during the months of May through July.
What will you study in Biology?(1 point)
Responses
the living world.
the living world.
the environment.
the environment.
the land, water, and air on Earth.
the land, water, and air on Earth.
animals and plants only.
In biology, you will study the living world, including animals, plants, and the environment.
hypothesis becomes something different when an acceptable amount of experimental data supports it. What does it become?(1 point)
Responses
inference
inference
theory
theory
conclusion
conclusion
fact
When an acceptable amount of experimental data supports a hypothesis, it becomes a theory.
When is a hypothesis useful in science?(1 point)
Responses
When it can be tested.
When it can be tested.
When it is proven correct.
When it is proven correct.
When the explanation is already known.
When the explanation is already known.
When it can be proven incorrect.
When it can be proven incorrect.
A hypothesis is useful in science when it can be tested and when it can be proven incorrect.
What does a scientist test when using a controlled experiment?(1 point)
Responses
several variables.
several variables.
a single variable.
a single variable.
a mass of information.
a mass of information.
a conclusion.
When using a controlled experiment, a scientist typically tests a single variable.
How would you describe the relationship between the two variables shown in the graph above (degree of slope and loss of soil from a container)?
(1 point)
Responses
The data indicates no relationship between the variables.
The data indicates no relationship between the variables.
Loss of soil increases as slope decreases.
Loss of soil increases as slope decreases.
Loss of soil decreases as slope increases.
Loss of soil decreases as slope increases.
Loss of soil increases as slope increases.
Loss of soil increases as slope increases.
Based on the information given, the relationship between the two variables shown in the graph is that loss of soil increases as slope increases.
n the above experiment, which variable is the responding (dependent) variable?
(1 point)
Responses
degree of slope
degree of slope
loss of soil (g)
loss of soil (g)
soil type
soil type
air temperature
The dependent (responding) variable in the above experiment is the loss of soil (g).
Which of the following statements are valid steps in the scientific method? Select all that apply.(4 points)
Responses
Check the internet for previous experiments
Check the internet for previous experiments
Evaluate results
Evaluate results
Verify the question
Verify the question
Form a hypothesis
Form a hypothesis
The valid steps in the scientific method are:
- Evaluate results
- Verify the question
- Form a hypothesis