GCSE Science: Experimental Design and Fair Testing

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What is the purpose of a control in an experiment?

To ensure all conditions remain the same

To modify the independent variable

To compare results with the experiment (correct)

To test the effect of a single variable

What is the effect of time interval on the temperature of a leaf on a Monday?

Temperature decreases as time interval increases

Temperature increases as time interval increases, but then decreases (correct)

There is no correlation between time interval and temperature

Temperature remains constant throughout the day

Which of the following is an example of a dependent variable?

The amount of salt added to water

The heartbeat rate of a person at rest (correct)

The type of exercise performed

The temperature of the water

What laboratory tool is least likely to be used in an experiment involving SO2?

Micropipette Signup and view all the answers

What is the purpose of a focus group in data collection?

To gather qualitative data through discussion Signup and view all the answers

Why is it important to change only one factor in an experiment?

To isolate the effect of the independent variable Signup and view all the answers

What is the primary concern when conducting an experiment, according to SO3?

Ensuring safe working conditions Signup and view all the answers

What is the purpose of plotting a graph, according to SO4 and SO5?

To draw simple conclusions based on data gathered Signup and view all the answers

What is the purpose of using graphs when recording data?

To display data visually Signup and view all the answers

What is an example of a method used to collect data in an experiment?

All of the above Signup and view all the answers

What is the convention for plotting graphs, according to SO5 and SO8?

Dependent variable vs. independent variable Signup and view all the answers

What should be included when heading a graph, according to SO5 and SO8?

The dependent variable vs. the independent variable Signup and view all the answers

What is the purpose of using a sharp pencil and a clean soft rubber in biological drawings?

To create a precise outline of the object Signup and view all the answers

What is the correct way to label lines in a biological diagram?

Label lines should end on the part indicated Signup and view all the answers

What is the purpose of using Universal Indicator paper in a physiological experiment?

To measure the pH of a solution Signup and view all the answers

In the experiment to demonstrate the rate of diffusion of a gas, what is the purpose of sealing the tube on both ends?

To prevent the gas from escaping Signup and view all the answers

What is the expected result of the experiment to demonstrate the rate of diffusion of a gas?

The red litmus paper will turn blue, starting with the piece nearest to the cotton wool Signup and view all the answers

What is the correct way to represent information from the table in the experiment to demonstrate the rate of diffusion of a gas?

Create a scatter plot to show the relationship between the distance and time taken for the litmus to turn blue Signup and view all the answers