Bio110 GRCC Unit 1 Test UPDATED
ACTUAL Exam Questions and
CORRECT Answers
What type of evidence most increases our confidence in experimental results? - CORRECT
ANSWER - Three different scientists do three different studies, all with the same result.
Thinking scientifically relies on: - CORRECT ANSWER - objective observation and
experimentation.
A "controlled" experiment occurs when: - CORRECT ANSWER - the control group receives
nothing.
Which of the following qualifies as a randomized, double-blind, controlled experimental study?
A total of 50 men and women of various ages are each given a candy bar with real sugar, 50 men
and women of various ages are each given a candy bar with artificial sweetener, and 50 men and
women of various ages are not given a candy bar. The people are then observed for signs of
sleepiness. The scientist knows what people did or did not eat, but the subjects don't know this
information.
A total of 50 men and women of various ages are each given a candy bar with real sugar, 50 men
and women of various ages are each given a candy bar with artificial sweetener, and 50 men and
women of various ages are not given a candy bar. The people are then observed for signs of
sleepiness. The subjects know which type of candy they ate, but the observing scientist does not.
A total of 50 men (who are 35 years old) are each given a candy - CORRECT ANSWER - A
total of 50 men and women of various ages are each given a candy bar with real sugar, 50 men
and women of various ages are each given a candy bar with artificial sweetener, and 50 men and
women of various ages are not given a candy bar. The people are then observed for signs of
sleepiness. No one (the scientist, the observer, and the subjects) knows what type of candy bar
was eaten, if any.
The purpose of the experimentation phase of the scientific method is to: - CORRECT
ANSWER - gather evidence to support or reject a hypothesis.
, In the steps of the scientific method, what is the process where a scientist writes down tentative
explanations or statements about what he or she expects might happen under certain conditions?
- CORRECT ANSWER - hypotheses formation
Which of the following constitutes the best reason for using control groups in experimental
design? - CORRECT ANSWER - Including a control group makes it more likely that the
results obtained in the experiment are due to differences in only one variable
An independent variable is: - CORRECT ANSWER - an observed and measured component
determined at the beginning of an experiment.
Your professor creates a line graph, displaying the relationship between the number of hours
spent studying each day with students' performance on midterm exams. What is the dependent
variable in this graph? - CORRECT ANSWER - exam performance on midterm exams
In the laboratory, you see a fuzzy growth on some of the gels in your incubator. What is the name
given to this step of the scientific method? - CORRECT ANSWER - observation
Statistics are used by scientists mainly to determine: - CORRECT ANSWER - whether
differences in results between control and treatment groups are significant and important.
Significance is truly founded in statistical analysis.
If you toss a coin and it comes up tails on eight consecutive tosses, what is the likelihood it will
come up tails on the ninth toss? - CORRECT ANSWER - 1/2
When conducting a scientific experiment, a(n) _____________ is tested. - CORRECT
ANSWER - prediction
When comparing two groups, the ______________, the more confident we are of the conclusion
that a significant difference exists in the groups. - CORRECT ANSWER - maller the variation
in each group
ACTUAL Exam Questions and
CORRECT Answers
What type of evidence most increases our confidence in experimental results? - CORRECT
ANSWER - Three different scientists do three different studies, all with the same result.
Thinking scientifically relies on: - CORRECT ANSWER - objective observation and
experimentation.
A "controlled" experiment occurs when: - CORRECT ANSWER - the control group receives
nothing.
Which of the following qualifies as a randomized, double-blind, controlled experimental study?
A total of 50 men and women of various ages are each given a candy bar with real sugar, 50 men
and women of various ages are each given a candy bar with artificial sweetener, and 50 men and
women of various ages are not given a candy bar. The people are then observed for signs of
sleepiness. The scientist knows what people did or did not eat, but the subjects don't know this
information.
A total of 50 men and women of various ages are each given a candy bar with real sugar, 50 men
and women of various ages are each given a candy bar with artificial sweetener, and 50 men and
women of various ages are not given a candy bar. The people are then observed for signs of
sleepiness. The subjects know which type of candy they ate, but the observing scientist does not.
A total of 50 men (who are 35 years old) are each given a candy - CORRECT ANSWER - A
total of 50 men and women of various ages are each given a candy bar with real sugar, 50 men
and women of various ages are each given a candy bar with artificial sweetener, and 50 men and
women of various ages are not given a candy bar. The people are then observed for signs of
sleepiness. No one (the scientist, the observer, and the subjects) knows what type of candy bar
was eaten, if any.
The purpose of the experimentation phase of the scientific method is to: - CORRECT
ANSWER - gather evidence to support or reject a hypothesis.
, In the steps of the scientific method, what is the process where a scientist writes down tentative
explanations or statements about what he or she expects might happen under certain conditions?
- CORRECT ANSWER - hypotheses formation
Which of the following constitutes the best reason for using control groups in experimental
design? - CORRECT ANSWER - Including a control group makes it more likely that the
results obtained in the experiment are due to differences in only one variable
An independent variable is: - CORRECT ANSWER - an observed and measured component
determined at the beginning of an experiment.
Your professor creates a line graph, displaying the relationship between the number of hours
spent studying each day with students' performance on midterm exams. What is the dependent
variable in this graph? - CORRECT ANSWER - exam performance on midterm exams
In the laboratory, you see a fuzzy growth on some of the gels in your incubator. What is the name
given to this step of the scientific method? - CORRECT ANSWER - observation
Statistics are used by scientists mainly to determine: - CORRECT ANSWER - whether
differences in results between control and treatment groups are significant and important.
Significance is truly founded in statistical analysis.
If you toss a coin and it comes up tails on eight consecutive tosses, what is the likelihood it will
come up tails on the ninth toss? - CORRECT ANSWER - 1/2
When conducting a scientific experiment, a(n) _____________ is tested. - CORRECT
ANSWER - prediction
When comparing two groups, the ______________, the more confident we are of the conclusion
that a significant difference exists in the groups. - CORRECT ANSWER - maller the variation
in each group
