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    Why is nitrogen oxide produced from a combustion engine? Brmmm Brmmm


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    describe fermentation and oxidation
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    (Original post by z_o_e)
    Why can scientists not predict earth quakes?

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    No one knows what goes under solid ocean floor? or there is not enough evidence idk
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    (Original post by j3ss1cah)
    What evidence did Wegener find to support his idea of continental drift?

    He found matching sedimentary rocks in South America and Africa

    He also found that South America and African continents could fit together like a jigsaw puzzle.
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    what is an ore
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    (Original post by sabrina235)
    what is an ore
    Contains enough metal to make it worth whilr extracting


    What is dependant and independent variable?
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    Dependant variable is what you measure and the independent is what you change during an experiment


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    (Original post by j3ss1cah)
    What is an advantage of a biofuel?
    They do not produce sulphur dioxide?
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    (Original post by z_o_e)
    Yes!!

    Q) Give properties of copper?

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    does not react with water (good for pipes)
    Good conductor of hear
    Good conductor of electricity (good for electric wires)
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    (Original post by Anmol_.)
    Name one property of a short molecule
    Low boiling point
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    (Original post by j3ss1cah)
    What evidence did Wegener find to support his idea of continental drift?
    Similat fossils/animals were found in different parts of the world

    He arranged the continents like a jigsaw puzzle and found that some of the continents were similar and fit together (eg africa and south america)
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    (Original post by WillsWheels)
    State the conditions needed for olive oil to be hardened. What does it have to react with?
    Hydrogentated- it reacts with hydrogen and a nickel catalyst.
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    What's the difference between energy change and enthalpy change?
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    (Original post by j3ss1cah)
    What evidence did Wegener find to support his idea of continental drift?
    East of S America and West of Africa fit together like puzzle pieces; fossils, plants, and animals found on 2 separate continents bore a striking resemblance/ had a common ancestor

    What is hydrogenation?
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    Good luck everyone! :banana2:
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    Yep, Good Luck to all


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