Home Tuition & Online Tutors in DHA Islamabad for Sciences

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Controlled Variables: Why Good Experiments Change Only One Thing

Experiment table with one independent variable

To test whether light affects plant growth, you cannot change light, water, soil, and temperature all at once. If growth changes, you will not know why.

Three roles

Independent variable: what you deliberately change
Dependent variable: what you measure
Controlled variables: everything else you keep the same

Science exams reward clear identification of these roles. Home and online science tuition in DHA Islamabad can practise rewriting messy method paragraphs into a one-variable plan.

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