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 first orchard
the first orchard
the number of peaches
the number of peaches
the pesticide
the pesticide
the second orchard
the pesticide
A theory(1 point)
Responses
is always true.
is always true.
is the opening statement of an experiment.
is the opening statement of an experiment.
may be revised or replaced.
may be revised or replaced.
is a problem to be solved.
may be revised or replaced.
Which of the following is not included in the design of an laboratory experiment?(1 point)
Responses
Conclusion
Conclusion
Procedure
Procedure
Materials used
Materials used
Problem statement
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
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.
The data do not support the hypothesis.
The data do not support the hypothesis.
The hypothesis is wrong.
The hypothesis is wrong.
Her observations were biased.
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.
experiment.
experiment.
conclusion.
conclusion.
analysis.
hypothesis.
When/where are safety procedures important?(1 point)
Safety procedures are important in all areas and activities where there is a potential for harm or injury. This includes but is not limited to laboratories, factories, construction sites, schools, and any other environments where hazardous materials, equipment, or conditions are present.
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
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 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 increased from June through December
The rate of photosynthesis increased from June through December
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 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.
animals and plants only.
animals and plants only.
the environment.
the environment.
the living world.
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
inference
inference
conclusion
conclusion
theory
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 it can be proven incorrect.
When it can be proven incorrect.
When the explanation is already known.
When it can be tested.
What does a scientist test when using a controlled experiment?(1 point)
Responses
a conclusion.
a conclusion.
several variables.
several variables.
a mass of information.
a mass of information.
a single variable
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 increases.
Loss of soil increases as slope increases.
Loss of soil decreases as slope increases.
Loss of soil decreases as slope increases.
Loss of soil increases as slope decreases.
Loss of soil increases as slope decreases.
The data indicates no relationship between the variables
Loss of soil increases as slope increases.
In the above experiment, which variable is the responding (dependent) variable?
(1 point)
Responses
air temperature
air temperature
soil type
soil type
degree of slope
degree of slope
loss of soil (g)
loss of soil (g)
loss of soil (g)
Which of the following statements are valid steps in the scientific method? Select all that apply.(4 points)
Responses
Form a hypothesis
Form a hypothesis
Verify the question
Verify the question
Check the internet for previous experiments
Check the internet for previous experiments
Evaluate results
Form a hypothesis
Verify the question
Evaluate results
What is the primary difference between a hypothesis and a theory in the scientific method?(1 point)
Responses
A hypothesis is a general principle that explains multiple phenomena, while a theory is a specific statement about a single observed occurrence
A hypothesis is a tentative explanation that can be tested through experimentation, while a theory is a comprehensive explanation supported by a large body of evidence.
A hypothesis is a widely accepted explanation that has been thoroughly proven, while a theory is a preliminary idea that requires further testing.
A hypothesis is a well-substantiated explanation of natural phenomena, while a theory is a testable prediction based on observations.