Show:
Definitons I
Definitions II
Definitions III
NJ ASK MULTIPLE CHOICE
NJ ASK REVIEW
100
A factor that changes in an experiment.
What is a variable?
100
The factor in an experiment that changes as a result of a change in an independent variable.
What is a dependent variable?
100
A variable that is isolated for study in an experiment and that the experiment manipulates.
What is an independent variable?
100
Other scientists carry out the same experiment to see if they get the same result.
How does the scientific community confirm that a scientist's work is valid?
100
You should test one at a time.
What is how many variables you should test at a time?
200
an idea that can be tested by a scientific investigation
What is a hypothesis
200
a controlled variable in an experiment that is kept the same from trial to trial.
What is a constant
200
a set of observations made in an experimenter, in which the independent variables are not changed, to be sure that the dependent variable remains the same also.
What is a control group
200
Jack hypothesized that robins prefer large birdhouses to small one. He built four birdhouses of different sizes to test his hypothesis. What was the independent variable in Jack's study?
The independent variable is the size of the birdhouse.
200
the number of observations made when gathering data.
What is sample size?
300
a variable that is kept the same from trial to trial
What is a controlled variable
300
a decision based on investigation and evidence.
What is a conslusion
300
a question used to focus the purpose of a scientific investigation and the procedure used to complete it.
What is a research question
300
In 1999, a team of researchers claimed that they had made a new element. Two other teams repeated the experiment but could not reproduce the results. The original team took back its claim. What do these events say about the process of scientific inquiry?
Experimental results must be reproducible to be accepted as valid.
300
a gym can control variables like wind speed and direction.
What is a good place to test an experiment?
400
the degree of conformity of a measure to a standard or a true value
What is accuracy
400
having the ability to get similar results from multiple trials
What is the definition of reproducible
400
A factor that changes in an experiment.
What is a variable?
400
Lewis wanted to know whether a new brand of shoe could make a basketball player jump higher. He found 18 basketball players who started using the shoes this season and measured how high each player could jump in the new shoes.What error did Lewis make in his investigation?
There was no control group?
400
it would take a long time to complete the experiment.
What is why it might be difficult to test one independent variable at a time?
500
the number of observations or data
What is sample size
500
An investigation in which all variables are identified and recorded so that the investigation can be repeated.
What is systematic investigation?
500
An experiment in which one independent variable is tested by keeping all other independent variables the same.
What is fair test?
500
Annessa designed an experiment to study how temperature affects the rate at which an enzyme digests a protein. she put equal masses of liver into four equal-sized test tubes, brought the test tubes to different temperatures, introduced equal amounts of enzyme to each tube, and measured the duration of the chemical reaction.
liver mass, test-tube size, and enzyme amount
500
In an experiment, there is a 25 gram clip and distance. Which one is the independent variable.
What is the 25 gram clip?