Science

6th

grade

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Natural Resources

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20 questions

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  • 1. Multiple Choice
    1 minute
    1 pt

    Geothermal energy is an alternative energy source. However, it is not resourceful enough to replace more than a minor amount of the Earth's energy needs. Why is this?

    There are only a few places where the Earth's core is hot. It is cool in places like Antarctica.

    The center of the Earth is not hot enough to make a significant energy contribution.

    Drilling through the Earth to reach areas hot enough to create steam is possible, but very expensive and difficult.

    Once the cool water is poured down the well and filters through the rocks, the rocks cool off and are no longer hot enough to turn water into steam.

  • 2. Multiple Choice
    30 seconds
    1 pt

    Which of the following is a nonrenewable energy source?

    solar power

    wind power

    heating oil

    biofuel

  • 3. Multiple Choice
    1 minute
    1 pt

    Most of the world's automobiles run on energy acquired from petroleum. Like all fossil fuels, petroleum is a nonrenewable energy resource. This means that it is a resource that cannot be replaced as quickly as humans use up existing supplies.

    Humans face a problem because once petroleum reserves begin to run out, there won't be enough fuel to power all the automobiles in the world. Which of the following is the best potential long-term solution to this specific problem of energy supply?

    Use more petroleum, but make sure it is used only in fuel-efficient automobiles.

    Maintain current consumption of petroleum, but use it only to manufacture plastics.

    Use a cleaner fossil fuel, such as natural gas, to power automobiles.

    Use renewable resources, such as solar energy, to power automobiles.

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