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Independent and Dependent Variables Biology Homework Chapter 1

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Requirements The following steps are required for each problem on the homework. 1.Independent Variable 2.Dependent Variable 3.Control 4.Hypothesis (If…Then Statement) 5.Data Table 6.Sample Graph (extra credit)

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Question 1: Light Bulb Temp. : Light bulb wattage (watts) Independent Variable: Light bulb wattage (watts) : L.B Temperature ( 0 Celsius) Dependent Variable: L.B Temperature ( 0 Celsius)Controls: –Distance temp. recorded from light bulb. –Room temp. must be consistent. –Time that bulb is turned on. –Brand/Type of bulb is the same. –Use the same lamp.

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Hypothesis: If we increase the bulb wattage, then the bulb temp. will increase also. Sample Data Table: Independent Var. Dependent Var. (Bulb Wattage) (Temperature o C) 40 Watts 60 Watts 75 Watts 100 Watts

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Sample Graph Bulb Wattage (Watts) Temperature (Celsius)

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