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Experimental Design and Variables

Authored by Lisa Thompson

Science

8th Grade

NGSS covered

Experimental Design and Variables
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25 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

This variable in an experiment is the one being deliberately changed by the scientist. 

dependent variable

independent variable

data

control group

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted. 

experimental group

control group

data

variables

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...

The type of plant

The amount of sunlight

The type of music

The type of liquid

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

4.

MATCH QUESTION

1 min • 1 pt

Identify the parts of the experiment -

kept same throughout experiment

Control Group

factor that changes in response to IV

Independent Variable

factor that is deliberately changed

Experimental Group

group that receives the IV

Dependent Variable

group that doesn't receive IV

Constants

Tags

NGSS.MS-PS2-2

5.

MATCH QUESTION

1 min • 1 pt

Match the following experimental variables

Group in an experiment that receives the treatment

Hypothesis

Variable that is manipulated in an experiment

Experimental group

Group in an experiment that does not receive the treatment

Depenent variable

Variable that is measured or observed in an experiment

Control group

Predicted explanation for a phenomenon

Independent variable

Tags

NGSS.MS-PS2-2

6.

MATCH QUESTION

1 min • 3 pts

Media Image

A student did an experiment to test how effective different antibiotics are. She treated one paper disk with water, and three others with different antibiotics. Each was placed on a dish where bacteria could grow.

Independent Variable

The type of antibiotic

Experimental Group

The bacterial growth

Constant Variable

The disk with water

Dependent

The size of the paper disks

Control Group

Disks with antibiotics

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

7.

MATCH QUESTION

1 min • 1 pt

Pea plant clones are giving different amounts of water for a three-week period. The first pea plant receives 400 milliliters a day. The second pea plant receives 200 milliliters a day. The third pea plant receives 100 milliliters a day. The fourth pea plant does not receive any extra water; the plant only receives natural ways of receiving water. The heights of the pea plants are recorded daily. What are the variables and control group?

Fourth pea plant

Independent Variable

Amount of water given

Dependent Variable

Pea plant heights

Control Group

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

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