1. What are variables? Or what changes during experiments….

2. Independent/Manipulated Variables What is changed (manipulated) The “If” part of the hypothesis The cause

3. Dependent/Responding Variable What is observed What is measured The “then” part of the hypothesis The data collected The effect/result

4. Controlled Variables Things that are kept constant (the same) in order to have accurate results

5. How does the temperature of water affect the rate at which sugar will dissolve in the water? Cold tap water Warm tap water Hot tap water (250 mL)(250 mL) (250 mL) Sugar (1g)Sugar (1 g)Sugar (1 g) Identify the following: Manipulated variable Responding variable Controlled variables

6. Manipulated variable: temperature of water Responding variable: the rate at which sugar dissolves in water Controlled variables: mass of sugar, volume of water, form of sugar (cubes), water source (tap), container type and size