Wayground
The Scientific Method - Printable Science Worksheets 8th Grade - Wayground

The Scientific Method

Marie Lombardo

Created by Marie Lombardo

20 questions

8th Grade

Science

Updated Oct 2026

The Scientific Method is a Grade 8 science worksheet that helps students identify and apply the core parts of an experiment. Across 20 questions—19 multiple choice and 1 multiple select—students distinguish observations, hypotheses, data, conclusions, variables, and experiments; identify independent, dependent, and constant variables; and explain why scientists change one variable at a time. Application items ask students to identify variables in paper-airplane and sled investigations and recognize the research question in an Oreo cookie investigation. This free printable worksheet with an answer key is useful for introducing, reviewing, or assessing scientific-method vocabulary and experimental design. It gives teachers a concise way to check whether students can move beyond definitions and identify variables and constants in familiar investigation scenarios. The worksheet is designed for Grade 8 science instruction, independent practice, homework, or a focused formative assessment.

Worksheet settings

Font size

S
M
L
XL
WaygroundWorksheets

The Scientific Method

Total questions: 20

Name
Class
Date
1.
The summary at the end of an experiment that explains the results is... 
a)
conclusion
b)
procedures
c)
materials
d)
responding variable
2.
A testable prediction about a scientific investigation is a(n)
a)
Question
b)
Observation
c)
Hypothesis
d)
Experiment
3.

The information you collect while doing your experiment is called

a)

conclusions

b)

data

c)

hypotheses

d)

procedures

4.

The variable that is being measured or observed is called the _______________.

a)

independent variable

b)

dependent variable

c)

control variable

5.

The process of getting information by using the senses is called a/an___

a)

Conclusion

b)

Observation

c)

Inquiry

d)

Scientific method

6.
The independent variable is the ONE thing you _____.
a)
change on purpose
b)
control or keep constant
c)
measure
7.

A hypothesis is simply a prediction that has not yet been ____.

a)
proven or disproven
b)
made into a theory
c)
results calculated
d)
written about
8.

Anything that can change in an experiment is called a ________.

a)

measurement

b)

variable

c)

obeservation

d)

hypothesis

9.

How many independent variables should you have in an experiment?

a)

two

b)

as many as possible

c)

four

d)

one

10.
Testing a hypothesis often involves a(n):
a)
answer
b)
experiment
c)
problem
d)
safety check
11.
Why do we want to test one variable at a time?
a)
Because it is hard to setup a data table with more
b)

To know what is causing the changes.

c)
It is what has always been done
12.

If I engage in class activities and discussions, then I will have a better science test score. What is the dependent variable?

a)

Class activities

b)

Engaging

c)

Discussions

d)

Science test score

13.

Ben makes five paper airplanes with different wing shapes. He throws them the same way from a starting point for three trials each. He records the distance each airplane flies.

What is the independent variable?

a)

Throwing the same way

b)

Wing shape

c)

The distance the airplane flies.

d)

Throwing from the same starting point.

14.

My brothers watned to see if a sled would go different speeds with different people on it. We alll rode in the sled separately. We meseaured how fast the sled went from the top of the hill to the fence at the bottom.

What are two CONSTANTS? (Select 2)

a)

Distance the sled travels.

b)

Using the same sled.

c)

The same people in the sled

d)

The speed of the sled.

15.

What was the research question in the Oreo Cookie Investigation?

a)

Are Double Stuf Oreos bigger than regular Oreos?

b)

Do Double Stuf Oreos taste better than regular Oreos?

c)

Do Double Stuf Oreos contain more sugar and calories than the regualr Oreos?

d)

Do Double Stuf Oreos contain two times the cream filling as regular Oreos?

16.

What was the dependent variable in the Oreo Cookie Investigation?

a)

The type of Oreo cookie.

b)

The mass of the cream filling in grams.

c)

The flavor of the Oreo cookie.

d)

The height of the cream filling in millimeters.

17.

We should always use average data from the largest sample size because it makes the data more believable/trust-worthy.

a)

True

b)

False

18.

The independent variable in the Oreo Cookie Investigation was...

a)

The type of Oreo cookie used (Double Stuf or regular).

b)

The mass of the cream filling in grams.

c)

The height of the cream filling in millimeters.

d)

The flavor of the cookie.

19.

In the Oreo Cookie Investigation, it was important to use the same flavor of cookie as a constant.

a)

True

b)

False

20.

Which unit of mass was used in the Oreo Cookie Investigation?

a)

G

b)

g

c)

mg

d)

kg

WaygroundAnswer Key

The Scientific Method

Total questions: 20

1.
a) conclusion
2.
c) Hypothesis
3.
b)

data

4.
b)

dependent variable

5.
b)

Observation

6.
a) change on purpose
7.
a) proven or disproven
8.
b)

variable

9.
d)

one

10.
b) experiment
11.
b)

To know what is causing the changes.

12.
d)

Science test score

13.
b)

Wing shape

14.
a)

Distance the sled travels.

, b)

Using the same sled.

15.
d)

Do Double Stuf Oreos contain two times the cream filling as regular Oreos?

16.
b)

The mass of the cream filling in grams.

17.
a)

True

18.
a)

The type of Oreo cookie used (Double Stuf or regular).

19.
a)

True

20.
b)

g

Browse by subjects

Browse by grades

Browse by format

FAQs

What does The Scientific Method worksheet cover?

This Grade 8 science worksheet uses 19 multiple-choice questions and 1 multiple-select question to assess scientific-method concepts. Students identify hypotheses, observations, data, conclusions, and experiments, then determine independent, dependent, and constant variables in examples such as paper-airplane and sled investigations.

How can I use this worksheet to teach the scientific method and variables?

Introduce the investigation sequence by having students connect a research question to a hypothesis, experiment, data, and conclusion. Then use the worksheet’s paper-airplane and sled scenarios to ask students to explain which factor is changed, which outcome is measured, and which conditions stay constant before they complete the multiple-choice and multiple-select items.

What mistakes should I watch for when students complete this scientific-method worksheet?

Students may confuse the independent variable, which is changed on purpose, with the dependent variable, which is measured or observed. In the paper-airplane item, they may select flight distance instead of wing shape; in the sled item, they may mistake speed or the people riding for constants, even though the constants are the distance traveled and the same sled.

How do I assign and grade The Scientific Method worksheet?

Wayground provides this worksheet as a printable PDF and as a digital quiz, and it includes a complete answer key for all 20 questions. Printable submissions can be graded by scanning student work with the Wayground for Teachers app.

How can I differentiate this scientific-method worksheet for my students?

Use the worksheet’s Advanced Settings to adjust font spacing and font size so the scientific-method terms and variable-identification questions are easier to read. You can also apply a dyslexia-friendly font or translate the worksheet into another language when those options better support access to the multiple-choice and multiple-select items.

Where can I find more worksheets like this on Wayground?

Wayground offers a broad collection of free printable worksheets and practice problems across subjects, with downloadable PDFs and answer keys to support essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.

© 2026 Wayground Inc.

Accessibility and Inclusion