Designing fair experiments

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Designing fair experiments

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  1. How to design fair science experiments

    Slide 1 - How to design fair science experiments

    • Year 7 Science
  2. What is a fair experiment?

    Slide 2 - What is a fair experiment?

    • In science, a fair experiment means you only change only one thing at a time and keep everything else the same.
  3. Experiment 1 - Is this fair?

    Slide 3 - Experiment 1 - Is this fair?

    • Zoe wanted to see whether salt water will make plants grow slower. She watered all the plants in her experiment every day for 2 weeks and then measured how tall they grew.
    • Watered with fresh water
    • Watered with salt water
  4. Experiment 2 - Is this fair?

    Slide 4 - Experiment 2 - Is this fair?

    • Sam wants to find out whether girls run faster than boys. She had girls and boys in her experiment running 50 metres and measured their times.
  5. Experiment 3 – Is this fair?

    Slide 5 - Experiment 3 – Is this fair?

    • Kim wanted to see whether lemons will slow the time for apples to turn brown.
    • Apples with lemons
    • Apples without lemons
  6. Experiment 4 – Is this fair?

    Slide 6 - Experiment 4 – Is this fair?

    • Andy wants to find out whether drinking coke will increase your heat rate. He measured the heart rate of two groups of people before and after they drank a can of coke.
  7. To design a fair experiment

    Slide 7 - To design a fair experiment

    • To be a scientist, you need to know how to design a fair experiment.
    • A fair experiment is where only one thing is changed at a time and everything else is kept the same.