1. Methods from Hypothesis

2. Defining variables Variables Independent Variable Dependent variable
What are the variables for the following hypotheses…
Independent Variable
What you change
Dependent variable
The result you measure
Control Variable
Everything that you keep the same
ONLY ONE
Dependent Variable
The strength of concrete depends on the amount of sand, cement and aggregate present.
Smarties melt at different speeds in the sun depending on their colour
The speed that oil and water separate depends on the amount of emulsifier present
The speed that marble chips react with Hydrochloric acid depends on the size of the marble chips

3. What you are going to do today
You are going to research your hypothesis and complete your ISA “candidate research sheets” with a method so that someone else could fully investigate your hypothesis.
In your ISA, you will be using your research sheet to carry out this practical.
You can use ANY equipment or chemicals that you need. Marks are awarded for safety and fair testing.

4. Viscosity of Oil Hypothesis
The viscosity of oil depends on the temperature of the oil.
Viscosity = the thickness of the liquid.
Context
Oil in engines needs to be viscous enough to move around the engine at different and high temperatures.