Here's link to the answer:
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ly/3a8Nt8n
Answer:
independent variable - the thing you change
dependent variable - the thing you measure
control variables - the things you keep the same
You can have as many controls as necessary, But they must remain equal at all times in order to get the most accurate results
Their weights could be different.
Their volumes could be different.
Their densities could be different.
The volume for an ounce of lead is much different than an ounce of aluminum.
the weight of a cubic meter of balsa wood is much different (and much lighter) than a cubic meter of water. That's why the ancients used balsa for their rafts.
