Scientific Method

The independent variable is

• The variable that you change in an investigation

• The variable that you measure in an investigation

• A variable that you keep the same in an investigation

The dependent variable is

• The variable that you change in an investigation

• The variable that you measure in an investigation

• A variable that you keep the same in an investigation

Which of the following is an appropriate aim for an investigation

• I aim to investigate whether the sky is blue

• To see what happens when I add mentos to coke

• To investigate the relationship between caffeine intake and reaction time

• To investigate how long it takes for a cart to roll down a ramp

If I floss more, then I will have fewer cavities. What is the independent variable?

(The variable that you change)

• Number of cavities

• Amount of flossing

• Type of floss used

• Amount of brushing

If I put on a higher factor sunscreen, then I will burn less. What is the dependent variable?

(The variable that you measure)

• Severity of sunburn

• Factor of sunscreen

• Time spent in the sun

• Weather conditions

Does pipe material affect the temperature of flowing water? What is a controlled variable?

(Select 2)

• Temperature of water

• Thickness of pipe

• Pipe material

• Diameter of pipe

For a graph, we need

• A title

• Axis labelled with units

• Independent variable on x-axis, dependent on y-axis

• All of the above

Which of the following should you include in your conclusion?

(Select 2)

• Whether the investigation was valid

• A statement of the results of the investigation.

• Whether the investigation was reliable

• Comparison with the hypothesis

If my experiment goes wrong, what do I do?

• Give up

• Record that as a final answer

• Do it again

• Ask an expert

1. give step by step instructions to conduct the experiment 

• hypothesis

• result

• method

• conclusion