Experimental design

Front

Which of the following statements best describes a controlled experiment?

Back

It always has a control group.

Front

In an experiment, the variable that you are testing is called the

Back

independent variable

Front

An if......then statement that can be tested by a scientist is called a(n)

Back

hypothesis

Front

In an experiment, the data that you are collecting can also be called the:

• independent variable
• dependent variable
• manipulated variable
• conclusion

Back

dependent variable

Front

Which of the following would be a way to increase the validity of an experiment?

• repeat the experiment several times
• use only a few test subjects
• do the experiment once
• Borrow data from another scientist

Back

repeat the experiment several times

Front

When graphing data, the independent variable will always be placed on ___________

Back

the X-axis

Front

Observations that describe the qualities of an object are called

Back

qualitative observations

Front

When you make a conclusion based upon observations and data you have collected, it is called a(n)

Back

inference

Front

To improve the reliability of the results from the lettuce seed germination experiment, the student should:

Back

repeat the experiment using a larger sample size

Front

Which statement about the use of independent variables in controlled experiments is correct?

Back

Only one independent variable is used for each experiment.