Grades 2–5
Science Observation Journal
Look closely at one object: draw it as if under a magnifying glass, describe it and ask a question.
Science worksheet · Scientific method
Hypotheses and Variables
For three experiments, name what you change, what you measure and what stays the same, then write an if-then hypothesis.
- Grade level
- Grades 3–5
- Time
- About 25 minutes
- Topic
- Scientific method
- Answer key
- Yes, page 2 of the PDF
- Kids practice
- The scientific method, Hypotheses, Fair tests
What kids do
Printed on the sheet:
- In a fair test, you change one thing, measure one thing and keep everything else the same.
- 1. Does a higher ramp make a toy car roll farther?
- I keep the same:
- 2. Do bean plants grow taller with more sunlight?
- 3. Does salt make ice melt faster?
Teacher tip
Teach “if I change…, then… will…” as a sentence frame.
How to use it
- Run a quick class experiment first, like which paper towel soaks up the most, and fill in the sheet together.
- Post the steps of the scientific method on the wall.
- Start with a two-minute “I notice, I wonder” talk about the picture on the sheet.
Watch for
A wrong hypothesis is not a failure. Scientists learn from it too.
Talk about it
- What did you change, and what stayed the same?
- What evidence helped you choose your answer?
Take it further
Let kids design their own fair test and present it at a mini science fair.
US Letter, prints well in black and white. Free for home and classroom use: print as many copies as you need.
More scientific method worksheets
Grades 3–5
Observation or Inference?
Ten sentences to mark as an observation (what you notice) or an inference (what you figure out).
Grades 2–4
Steps of the Scientific Method
Number the seven steps of the scientific method in order, then match three words to their meanings.
Grades 2–5
Science Experiment Recording Sheet
A lab sheet for any experiment: question, hypothesis, materials, steps, data, results and conclusion.
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