Science with Astronaut
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Day 2
📝 Worksheet
Observing, Recording and Fair Tests
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In a fair test, how many variables should you change at a time?
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A
As many as possible
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B
Two
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C
Only one
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Why do scientists write observations down immediately?
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A
Because memory changes and fades
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B
Because teachers demand it
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C
Because pens dry out
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In the salt water test, the amount of salt added is the...
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A
Controlled variable
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B
Independent variable
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C
Conclusion
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Why do scientists repeat an experiment?
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A
To waste materials
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B
Because they forget the result
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C
Because one result could be an accident
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