Reviewing Experiment Design Basics - SCI 7 - Spring

What is the independent variable in an experiment?

• The variable that is measured or observed

• The variable that is changed or controlled by the experimenter

• The variable that remains constant

• The group that does not receive the experimental treatment

Tags

NGSS.MS-PS2-2

In an experiment testing the effect of light on plant growth, what is the dependent variable?

• The amount of light

• The type of plant

• The height of the plant

• The soil type

Why is a control group important in an experiment?

• It receives the experimental treatment

• It allows for comparison to see if the independent variable has an effect

• It is the group where all variables are changed

• It is the group that receives extra variables

Which of the following is an example of a constant in an experiment?

• The temperature is equal at all times during which the experiment is conducted

• The variable that is changed by the experimenter each time

• The "effect" that is measured

• The group that receives the experimental treatment

What is a good format for a hypothesis?

• If (DV change), then (IV change), because (rationale)

• If (IV change), then (DV change), because (rationale)

• Because (rationale), if (IV change), then (DV change)

• Then (DV change), if (IV change), because (rationale)

In an experiment with daphnia, if the independent variable is the temperature of the water, what could be a dependent variable?

• The size of the daphnia

• The heart rate of the daphnia

• The type of water used

• The amount of food given

Which of the following best describes an experimental group?

• The group that does not receive the experimental treatment

• The group that receives the experimental treatment

• The group where all variables are kept constant

• The group that is used for comparison

In an experiment to test the effect of different types of fertilizer on plant growth, what is the independent variable?

• The amount of water given to the plants

• The type of fertilizer used

• The growth of the plants

• The amount of fertilizer used

What is the role of constants in an experiment?

• To ensure that the independent variable is the only factor affecting the dependent variable

• To change the outcome of the experiment

• To serve as the main focus of the experiment

• To provide a basis for comparison

Which of the following is a well-formed hypothesis?

• If the temperature increases, then the fish will swim faster, because they are more active in warm water.

• If the fish swim faster, then the temperature increases, because they are more active.

• If the fish are more active, then the temperature increases, because they swim faster.

• If the temperature increases, then the fish will swim slower, because they are more active in warm water.

Tags

NGSS.MS-LS1-5