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Definitions
Definitions
Definitions
Review Questions
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100
the degree of conformity of a measure to a standard of a true value
What is accuracy
100
the factor in an experiment that changes as a result of a change in an independent variable
What is dependent variable
100
a question used to focus the purpose of a scientific investigation and the procedure used to complete it
What is research question
100
To start an investigation Juanita takes her glider to the school's gym and makes 10 test flights. Name two things Juanita must do to know the distances of the shortest and longest flights.
What is she must measure the distance of each flight and record each distance she measured.
100
How does the scientific community confirm that a scientist's work is valid?
What is other scientists carry out the same experiment to see if they get the same result
200
a decision based on investigation and evidence
What is conclusion
200
an experiment in which one independent variable is tested by keeping all independent variables the same
What is fair test
200
the number of observations or data
What is sample size
200
Juanita considers making adjustments to the plane all at once. After thinking, she realized that, that was not the best way to figure out how to improve the glider. Why do you think Juanita decided that this was not the best way to figure out how to improve her glider?
What is she should test one independent variable (adjustment) at a time.
200
What is the independent variable for the hypothesis that robins prefer large birdhouses to small birdhouses in which four different sized birdhouses are created to test the hypothesis?
What is the size of the birdhouse
300
a controlled variable in an experiment that is kept the same from trial to trial
What is constant
300
an idea that can be tested by scientific investigation
What is hypothesis
300
an investigation in which all variables are identified and recorder so that the investigation can be repeated
What is systematic investigation
300
Suggest how Juanita can keep factors such as wind speed and direction constant in her trials.
What is she should conduct her trials in a gym where the wind remains constant
300
a team of researchers claimed that they had made a new element. Two other teams repeated the experiment but could not get the same results. Therefore the original team took back their claim. What do these events say about the process of the scientific inquiry?
What is experimental results must be reproducible to be accepted as valid
400
a set of observations made in an experiment, in which the independent variables are not changed, to be sure that the dependent variable remains the same also
What is control group
400
a variable that is isolated for study in an experiment and that the experimenter manipulates
What is independent variable
400
a factor that changes in an experiment
What is variable
400
Juanita already has a control group. What is it?
What is her control group were the first ten flights.
400
Lewis wanted to know whether a new brand of shoes made a basketball player jump higher. He found 18 basketball players who started using the shoes and measured how high they could jump in the new shoe. What error did Lewis make in the investigation?
What is there was no control group for the study
500
a variable that is kept the same from trial to trial
What is controlled variable
500
having the ability of getting similar results from multiple trials
What is reproducible
500
why is it important to never return chemicals used in an experiment to their original containers?
What is they may be contaminated
500
Why is it important that Juanita writes down the location of the clip on the plane and the result of each test flight?
It will let her know which location of the clip will make the plane fly farther
500
Annessa designed an experiment to test how temperature affects the rate at which an enzyme digests a protein. she put equal masses of liver into four equal sized test tubes. Then she brought the the tubes to different temperatures and introduced equal amounts of enzyme to each tube and measured the duration of the chemical reaction. What parameters were held constant in the experiment.
What is the liver mass test tube size and the enzyme amount