Grade 4 · Science · Engineering

4th Grade Plan Fair Tests worksheets

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Plan Fair Tests

Grade 4 Science Worksheet

NameDate

Read the investigation. Write the answer on the line.

Read this first
A paper plane test
Maya made three paper planes with different wing sizes. She threw each plane once from the same spot and measured how far it flew.
Small wings: 4 m
Medium wings: 9 m
Large wings: 6 m
What was changed from one trial to the next?
Which plane flew the farthest?
What was the result for the medium plane? Write the number.
Name one thing that stayed the same in every trial.
How many more meters was the biggest result than the smallest? Write the number.
Which plane gave the second-biggest result?
Which plane flew the shortest distance?
Maya throws the large plane much harder than the other two. Is the test still fair? Write yes or no.

4th Grade Plan Fair Tests worksheet 1 – printable PDF — Download PDF: 1 2 3 4 5 6

About this worksheet

Planning fair tests helps students compare designs using evidence instead of opinion asks fourth graders to connect observations with an explanation, model, or design decision instead of choosing a fact from memory. Students may change several variables at once, which makes the results hard to explain. This worksheet uses short investigations and evidence-based situations so students must read what happened, decide which science idea is being tested, and choose the answer that fits the title. Students choose fair test procedures, identify controlled variables, read design data, and select improvements from test results.

Support versions use familiar objects and direct wording. Standard and challenge versions add closer distractors, fair-test language, and multi-step evidence. Ask your child to point to the measurement, diagram, map, or observation before answering. If the choice does not explain the evidence in the prompt, it is probably a distractor. That habit keeps science reasoning tied to data rather than guesswork.

What your child will learn

Plan fair tests
Control variables
Use measurements
Read test evidence
Improve designs

NGSS standard: 3-5-ETS1-3

Worked example

To compare two bridge designs, add washers one at a time in the same place on each bridge until it bends.

Common mistake

Testing one design with more weight or a different surface and then comparing the results.

Helpful hint

Change only the design being tested; keep conditions the same.

Next skill: Map Earth Process Effects Earlier: Compare Engineering Solutions

Questions parents ask

What is the most common mistake with plan fair tests?

Testing one design with more weight or a different surface and then comparing the results.

How can I help my child with plan fair tests?

Change only the design being tested; keep conditions the same.

Are these 4th grade science worksheets free to print?

Yes. All 6 printable versions on this page are free to download and print, with no account needed.

More 4th grade engineering

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