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 second orchard
the second orchard
the pesticide
the pesticide
the number of peaches
the number of peaches
the first orchard
the first orchard
the pesticide
A theory(1 point)
Responses
may be revised or replaced.
may be revised or replaced.
is a problem to be solved.
is a problem to be solved.
is always true.
is always true.
is the opening statement of an experiment.
may be revised or replaced.
Which of the following is not included in the design of an laboratory experiment?(1 point)
Responses
Problem statement
Problem statement
Conclusion
Conclusion
Materials used
Materials used
Procedure
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
A 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.
Her observations were biased.
Her observations were biased.
The data do not support the hypothesis.
The data do not support the hypothesis.
The hypothesis is wrong.
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
hypothesis.
hypothesis.
conclusion.
conclusion.
experiment.
experiment.
analysis.
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
all of the above
all of the above
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
Photosynthetic organisms were dormant during the months of April through August
Photosynthetic organisms were dormant during the months of April through August
Photosynthetic organisms experienced die-off during the months of January through June.
Photosynthetic organisms experienced die-off during the months of January through June.
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
The rate of photosynthesis increased from June through December
The rate of photosynthesis was greatest during the months of May through July
What will you study in Biology?(1 point)
Responses
the land, water, and air on Earth.
the land, water, and air on Earth.
the environment.
the environment.
the living world.
the living world.
animals and plants only.
the living world.
A hypothesis becomes something different when an acceptable amount of experimental data supports it. What does it become?(1 point)
Responses
fact
fact
conclusion
conclusion
inference
inference
theory
theory
When is a hypothesis useful in science?(1 point)
Responses
When the explanation is already known.
When the explanation is already known.
When it can be proven incorrect.
When it can be proven incorrect.
When it is proven correct.
When it is proven correct.
When it can be tested.
When it can be tested.
What does a scientist test when using a controlled experiment?(1 point)
Responses
a conclusion.
a conclusion.
a single variable.
a single variable.
several variables.
several variables.
a mass of information.
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
Loss of soil increases as slope decreases.
Loss of soil increases as slope decreases.
The data indicates no relationship between the variables.
The data indicates no relationship between the variables.
Loss of soil increases as slope increases.
Loss of soil increases as slope increases.
Loss of soil decreases as slope increases.
Loss of soil increases as slope increases.
In the above experiment, which variable is the responding (dependent) variable?
(1 point)
Responses
soil type
soil type
degree of slope
degree of slope
loss of soil (g)
loss of soil (g)
air temperature