Scientific Method and Graphing Exam - Part I and 2 Review

Front

How can the experiment to determine the most effective mouthwash against mouth bacteria be improved?

Back

Using the same size paper discs for each mouthwash.

Front

What should researchers base their conclusions on in a well-designed experiment?

Back

Data from repeated trials of the experiment.

Front

What would not be an appropriate first step for a scientist planning an experiment on the effect of heat on enzyme function?

Back

Completing a data table of expected results

Front

Which procedure must be followed for the results of an experiment to be considered valid?

Back

The experiment must be repeated a number of times and yield similar results.

Front

How can the validity of the results be improved in an experiment where lettuce seeds were planted under soil and scattered on top of soil?

Back

Repeat the experiment.

Front

Which research technique might result in the claim that deer prefer apples over corn being questioned?

Back

The scientist observed four deer in different locations at various times of the day.

Front

In an experiment to determine if caffeinated soda increases pulse rate, what is the dependent variable?

Back

pulse rate of each group

Front

What is the greatest problem with the procedure used by a company that tested their multivitamin on 2000 individuals for one year?

Back

No control group was used.

Front

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

Back

Only one independent variable is used for each experiment.

Front

In Texas, researchers gave a cholesterol-reducing drug to 2,335 people and an inactive substitute (placebo) to 2,081. Most of the volunteers were men who had normal cholesterol levels and no history of heart disease. After 5 years, 97 people getting the placebo had suffered heart attacks compared to only 57 people who had received the actual drug. The researchers are recommending that to help prevent heart attacks, all people (even those without high cholesterol) take the cholesterol-reducing drug. In addition to the information above, what is another piece of information that the researchers must have before support for the recommendation can be justified?

Back

Were the eating habits of the two groups similar?