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Boss quiz

10 questions on the whole topic. You get one try at each.

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  1. Which layer of the Earth is liquid?

    • The outer core
    • The crust
    • The mantle
    • The inner core

  2. Granite is made of large crystals locked together. How did it form?

    • Heat and pressure changed limestone
    • Layers of sand were squashed together
    • Shells settled on the sea bed
    • Magma cooled slowly underground

  3. Which type of rock is most likely to contain fossils?

    • Igneous
    • Sedimentary
    • Metamorphic
    • None of them

  4. Limestone is heated and squeezed deep underground, but it does not melt. What does it become?

    • Granite, an igneous rock
    • Sandstone, a sedimentary rock
    • Magma
    • Marble, a metamorphic rock

  5. What is the difference between weathering and erosion?

    • They are two names for the same thing.
    • Weathering melts rock. Erosion cools it.
    • Weathering moves rock. Erosion breaks it up.
    • Weathering breaks rock up. Erosion moves the pieces away.

  6. About how much of the air is nitrogen?

    • 78%
    • 1%
    • 21%
    • 50%

  7. Which process takes carbon dioxide out of the air?

    • Photosynthesis
    • Respiration
    • Decay
    • Combustion

  8. Which of these is a greenhouse gas?

    • Nitrogen
    • Methane
    • Argon
    • Oxygen

  9. Why does burning petrol in cars add to global warming?

    • It gives out carbon dioxide, a greenhouse gas
    • It uses up the nitrogen in the air
    • It makes the air around the Earth thinner
    • It takes carbon dioxide out of the air

  10. Why does recycling aluminium cans make aluminium ore last longer?

    • Recycled cans weigh more
    • Recycling makes new ore in the ground
    • Ore is no longer needed at all
    • Less new ore has to be mined
Answers
  1. The outer core. The outer core is liquid iron and nickel. The inner core is solid.
  2. Magma cooled slowly underground. Granite is an igneous rock. Slow cooling gives crystals time to grow.
  3. Sedimentary. Dead plants and animals can be buried in the layers of sediment.
  4. Marble, a metamorphic rock. Heat and pressure change an existing rock into a metamorphic rock.
  5. Weathering breaks rock up. Erosion moves the pieces away. Rain, frost and roots break rock up. Rivers, ice and wind carry the pieces away.
  6. 78%. Air is about 78% nitrogen and 21% oxygen.
  7. Photosynthesis. Plants take in carbon dioxide to make glucose. The other three put carbon dioxide into the air.
  8. Methane. Methane and carbon dioxide are greenhouse gases.
  9. It gives out carbon dioxide, a greenhouse gas. Petrol is made from crude oil, a fossil fuel. Burning it adds carbon dioxide to the air.
  10. Less new ore has to be mined. Recycling reduces the need to extract new material from the Earth.