Grade 4Scientific InquiryOriginal practice

Compare Plant Growth Intervals: Explain and Extend Worksheet — Grade 4

Compare Plant Growth Intervals: Explain and Extend. Calculate growth from observations without claiming an untested cause. Includes three matched practice sets with answer guidance. Print on Letter or A4; save customized practice as PDF through browser printing.

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3 distinct sets for the same goals and support level. Each set keeps its material and matching answers together. Choose “Save as PDF” in your browser’s print window to keep a copy.

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Ages 9-10 · About 15 minutes · Independent practice

What students will do: Calculate growth from observations without claiming an untested cause.
Age and response support: Read the units and labels first. Ask for evidence before extending the model.
Before assigning: Subtract whole-number heights and read elapsed intervals.
Materials: Pencil

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Unit goals and teaching guide →

Independent activity · About 15 minutes · Pencil

Practice set 1 of 3. Each set keeps the same learning goal and task structures.

Sheet 32024BC8 · questions and answers share this ID

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Grade 4 · Science

Compare Plant Growth Intervals: Explain and Extend

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Learning goal: Calculate growth from observations without claiming an untested cause.

Grade 4 · Science · continued

Compare Plant Growth Intervals: Explain and Extend

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Compare Plant Growth Intervals — Model 1

Invented practice data for comparing records; not a report of a real investigation.

These invented heights describe one plant measured in centimeters on days 1, 4 and 7. No comparison plant was measured.

Read the model, then answer. You may explain aloud or draw; an adult may record your ideas.

1.Do these records alone prove that a fertilizer caused the growth? Explain.

2.What is the total increase from day 1 to day 7 in centimeters?

3.Name one way to keep future height measurements comparable.

Grade 4 · Science · Answer key

Compare Plant Growth Intervals: Explain and Extend

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Fixed answers refer to the displayed model. Open responses use the stated criteria; other supported responses may be acceptable.

Grade 4 · Science · Answer key · continued

Compare Plant Growth Intervals: Explain and Extend

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Compare Plant Growth Intervals — Model 1

Invented practice data for comparing records; not a report of a real investigation.

These invented heights describe one plant measured in centimeters on days 1, 4 and 7. No comparison plant was measured.

Read the model, then answer. You may explain aloud or draw; an adult may record your ideas.

1.Do these records alone prove that a fertilizer caused the growth? Explain.

Look for

Use the supplied quantities or observations and show how they support the response.

One possible response: No. There is no comparison condition and other influences were not tested.

2.What is the total increase from day 1 to day 7 in centimeters?

Answer:5

3.Name one way to keep future height measurements comparable.

Look for

Use the supplied quantities or observations and show how they support the response.

One possible response: Measure from the same reference point with the same unit and method.

About this practice

Grade 4 · Science · Matching answer key included · US Letter and A4

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Teaching guide, sample answers and curriculum references

Before you begin

Subtract whole-number heights and read elapsed intervals.

How to use this worksheet

Read one label and connect it to the model.
Compare two records using their units.
Explain or revise one claim using the supplied evidence.

A common mistake to discuss

Inferring a cause from one plant’s height record alone.

What to practice next

Try a different matched set, then explain what changed and what stayed the same.

Published 2026-11-04; updated 2026-11-04. Read our editorial policy.

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Compare Plant Growth Intervals: Read and Compare

Compare Plant Growth Intervals — Model 1

Invented practice data for comparing records; not a report of a real investigation.

These invented heights describe one plant measured in centimeters on days 1, 4 and 7. No comparison plant was measured.

Read the model, then answer. You may explain aloud or draw; an adult may record your ideas.

1.What was the height on day 4 in centimeters?

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Grade 4

Key

Compare Plant Growth Intervals: Read and Compare

Practice · Independent · 15 min

Compare Plant Growth Intervals: Read and Compare. Calculate growth from observations without claiming an untested cause. Includes three matched practice sets with answer guidance. Print on Letter or A4; save customized practice as PDF through browser printing.

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Ramp Tests: Change One Thing

Invented toy-car data: low ramp distances 30, 32, 34 cm; high ramp distances 48, 50, 52 cm. Each trial uses the same car, floor, release point, and a release without a push. Only ramp height changes.

Use the model to complete each task. Spoken or drawn responses are welcome where indicated.

1.Which condition changes between the two sets of trials?

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Grade 3

Key

Ramp Tests: Change One Thing

Practice · Independent · 25 min

Ramp Tests: Change One Thing: Grade 3 printable practice with five tasks, an answer key, and teacher guidance. Print on US Letter or A4, or save as PDF from the print window.

Printable activity

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Design a Comparison With Clear Variables: Apply and Create

An invented comparison plan

Invented practice data or scenario; not a report of a real study.

A class wants to compare two paper bridge folds. It proposes equal paper, equal gaps and the same blocks. The class will record the number of blocks held before each bridge falls and repeat each design three times.

Use what you learned to explain, construct or apply an idea.

1.Would using heavier blocks for only one fold keep the comparison fair?

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Grade 5

Key

Design a Comparison With Clear Variables: Apply and Create

Apply · Independent · 20 min

Design a Comparison With Clear Variables — Apply and Create. Plan a comparison that changes the intended factor only. Includes a contextual transfer task and answer criteria. Print on US Letter or A4, or save as PDF from the print window.

Printable activity

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Design a Comparison With Clear Variables

An invented comparison plan

Invented practice data or scenario; not a report of a real study.

Use the material to work through each task. Show the requested response.

1.What is intentionally changed?

Practice preview

Grade 5

Key

Design a Comparison With Clear Variables

Practice · Independent · 30 min

Design a Comparison With Clear Variables. Plan a comparison that changes the intended factor only. Includes a contextual transfer task and answer criteria. Print on US Letter or A4, or save as PDF from the print window.

Printable activity

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