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surface
The surfaces differ while the car is kept the same.
Class 3 · Bangla Version · General science
Plan a fair comparison and record findings
Explore plan a fair comparison and record findings with an example and your own answers.
Original Kidemy foundation practice · Read the example, write your answers, then check. This starter is shared across class versions; it is not a complete board-specific lesson or course.
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Learn the idea
A fair comparison changes one tested factor and keeps other important conditions alike. Repeat observations and record unexpected results as well.
Worked example
Compare how far the same toy car rolls on two surfaces. Keep the starting point and push method as similar as possible.
- Read the example and explain which rule or evidence it uses.
- Try each task yourself, then compare the answer and its reason.
Your written practice
Show your working on paper and enter your answer here. If it does not match, compare the model and try again.
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ruler
A ruler or tape measures distance.
Write in your own words. A guardian or teacher should review this response.
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Use the same starting point.
Accept a relevant condition such as car, starting position or release method.
Take it further
Apply the idea in a new situation and explain your method. Open writing needs a guardian or teacher to review it.
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28
Compare the three measured distances.
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kept the same
Keeping the car alike helps isolate the surface comparison.
Write in your own words. A guardian or teacher should review this response.
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Keep the measurement in the record, check the method and repeat if appropriate. A difference alone is not a reason to erase a result.
Value an honest record and investigate possible causes.
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