# Can he conclude that the amounts of fertilizer used on those plants were lethal What other factors might have affected the results?

## Can he conclude that the amounts of fertilizer used on those plants were lethal What other factors might have affected the results?

Can he conclude that the amounts of fertilizer used on those plants were lethal? What other factors ight have affected the results? No, the sample size was too small to determine this and some factors could be the amount of water or sunlight the plant received.

What variable is being changed in this experiment?

The independent variable is the variable that is deliberately changed by the scientist. The dependent variable is the one observed during the experiment. The dependent variable is the data we collect during the experiment.

### Which of the following is the dependent variable in the experiment AP Bio?

The dependent variable is what the investigator measures (or counts or records). It is what the investigator thinks will vary during the experiment. For example, he may want to study peanut growth. One possible dependent variable is the height of the peanut plants.

How many variable should be tested in an experiment?

An experiment usually has three kinds of variables: independent, dependent, and controlled.

#### Is a tentative explanation of an observation?

A hypothesis is a tentative explanation for an observation. A scientific theory is a well-tested and consistently verified explanation for a set of observations or phenomena.

What controlled variable?

A control variable is an element that is not changed throughout an experiment, because its unchanging state allows the relationship between the other variables being tested to be better understood.

## How can you differentiate a dependent variable from an independent variable?

The independent variable is the cause. Its value is independent of other variables in your study. The dependent variable is the effect. Its value depends on changes in the independent variable.

Which of the following observations best helps justify the researcher’s claim?

Which of the following observations best helps justify the researcher’s claim? As light energy is converted to chemical energy by metabolic processes, some of the energy is lost as heat. You just studied 27 terms!

### Which of the following is the dependent variable in the experiment?

The dependent variable is the variable that is being measured or tested in an experiment. 1 For example, in a study looking at how tutoring impacts test scores, the dependent variable would be the participants’ test scores, since that is what is being measured.

Why you Cannot draw a conclusion about the effect of one variable in an investigation when the other key variables are not controlled?

Explain why you cannot draw a conclusion about the effect of one variable in an investigation when the other key variables are not controlled. You cannot draw a conclusion because you would not know which variable is the one being affected if they are not controlled.

#### What are variables and how many should be used at one time in an experiment?

An experiment should only test one variable at a time, which is called the independent variable.