AP Bio Unit 1 - Chemistry of Life

1.1 - The independent variable is

the variable that is intentionally changed/ manipulated in an experiment to observe its effect on a dependent variable

1.1 - The dependent variable is

the variable that is measured or observed in an experiment, which is affected by changes in the independent variable.

1.1 - The control variable is

used for comparison, where scientists compare the experimental group to a control group

1.1 - A control variable is also known as a

control group

1.1 - Constants are

all of the factors that are kept exactly the same for every group in the experiment

1.1 - A null hypothesis is

a hypothesis that states there is no difference/relationship between the independent and dependent variables

1.1 - A alternative hypothesis is

a hypothesis that states that there is a relationship between the independent and dependent variables

1.1 - Graphs aim to

display the data collected in a controlled experiment

1.1 - The six major parts of a graph are

1. Title

2. Independent variable (x-axis)

3. Dependent variable (y-axis)

4. Axis labels with units

5. Scale for each variable

6. Legend or key

1.1 - The two most common types of graphs are

Line and bar graphs