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In order to be valid, an experiment can only
test one variable at a time
variable that results from a manipulation
variable that is being manipulated
a valid hypothesis
Quantitative
One of the media lacked the nutrients needed for the bacteria to grow.
How do size and shape affect an object’s rate of free fall?
valid because the sample size was sufficient for accuracy
Ten different types of culture media were inoculated with the same strain of bacteria and incubated at the same temperature. Nine of the cultures grew. Which of these conclusions can be drawn from this information?
test one variable at a time
variable that results from a manipulation
variable that is being manipulated
a valid hypothesis
Quantitative
One of the media lacked the nutrients needed for the bacteria to grow.
How do size and shape affect an object’s rate of free fall?
valid because the sample size was sufficient for accuracy
The dependent variable in an experiment is the
test one variable at a time
variable that results from a manipulation
variable that is being manipulated
a valid hypothesis
Quantitative
One of the media lacked the nutrients needed for the bacteria to grow.
How do size and shape affect an object’s rate of free fall?
valid because the sample size was sufficient for accuracy
The independent variable in an experiment is the
test one variable at a time
variable that results from a manipulation
variable that is being manipulated
a valid hypothesis
Quantitative
One of the media lacked the nutrients needed for the bacteria to grow.
How do size and shape affect an object’s rate of free fall?
valid because the sample size was sufficient for accuracy
As temperature drops to the dew point, clouds form in the atmosphere, and dew forms on ground surfaces. A scientist proposes that adding more water molecules to the atmosphere will change the dew point. This proposal is —
test one variable at a time
variable that results from a manipulation
variable that is being manipulated
a valid hypothesis
Quantitative
One of the media lacked the nutrients needed for the bacteria to grow.
How do size and shape affect an object’s rate of free fall?
valid because the sample size was sufficient for accuracy
Objects of the same mass but of different sizes and shapes were dropped from a given height. Their rates of free fall were measured and recorded. Which of the following is most likely the question this experiment was designed to answer?
test one variable at a time
variable that results from a manipulation
variable that is being manipulated
a valid hypothesis
Quantitative
One of the media lacked the nutrients needed for the bacteria to grow.
How do size and shape affect an object’s rate of free fall?
valid because the sample size was sufficient for accuracy
Data that can be measured is said to be
test one variable at a time
variable that results from a manipulation
variable that is being manipulated
a valid hypothesis
Quantitative
One of the media lacked the nutrients needed for the bacteria to grow.
How do size and shape affect an object’s rate of free fall?
valid because the sample size was sufficient for accuracy
In an investigation 10,000 dung beetles were examined for the presence of parasites. The data showed that about 5% of the beetles had parasites. The results are —
test one variable at a time
variable that results from a manipulation
variable that is being manipulated
a valid hypothesis
Quantitative
One of the media lacked the nutrients needed for the bacteria to grow.
How do size and shape affect an object’s rate of free fall?
valid because the sample size was sufficient for accuracy
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