More difficult of the Science questions -(20) Please help me

Can you suggest one way to make a paper helicopter turns more rounds during free falling? Try to design a scientific investigation to test your idea. You can follow the questions below to construct the investigation.

(a) Write down the problem that you are going to investigate.

(b) Suggest a hypothesis for the problem you are investigating.

(c) (I) What is the variable to be changed?

(II) What are the variables to be kept constant?

(III) What is the result to be compared?

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  • 1 十年前
    最愛解答

    a) Write down the problem that you are going to investigate.

    How does the amount of liquid fertilizer added affect the colour of leaves and height of small cabbage plants?

    b) Suggest a hypothesis for the problem you are investigating.

    Add more liquid fertilizer is the best for the plants.

    c)

    I) What is the variable to be changed?

    The amount of liquid fertilizer added to each small cabbage plants

    II) What are the variables to be kept constant?

    -Same amount os water added everyday.

    -Same amount of soil.

    III) What is the result to be compared?

    ....i don't understand it......SOR~

    2006-11-23 19:08:05 補充:

    參考資料:My science WS~

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