Unit 5: Earth Systems

24 Questions | Total Attempts: 68

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7th Grade Quizzes & Trivia

Unit 5 quiz for CCSET Grade 7/8 class. April 30, 2009


Questions and Answers
  • 1. 
    The Earth's crust is made up of
    • A. 

      Oceans and basins

    • B. 

      Continents

    • C. 

      Layers deep beneath the surface of the Earth

    • D. 

      All of the above

  • 2. 
    Volcanoes are made by
    • A. 

      The Earth's plates shifting to produce cracks

    • B. 

      Hot lava in the Earth's crust leaking out

    • C. 

      Nothing, they are just naturally here

    • D. 

      Pressure squeezing lava

  • 3. 
    The rock plates that float across the surface of the Earth
    • A. 

      Are called tectonic plates

    • B. 

      Float on the mantle between the core and the crust

    • C. 

      Hold up the huge land masses called continents

    • D. 

      All of the above

  • 4. 
    The Earth's layers from the inside out are
    • A. 

      Mantle, inner core, outer core, crust

    • B. 

      Inner core, outer core, mantle, crust

    • C. 

      Crust, mantle, inner core, outer core

    • D. 

      Core, mantle, crust

  • 5. 
    Minerals
    • A. 

      Are molten magma

    • B. 

      Are hard to find

    • C. 

      Have one chemical composition all the way through

    • D. 

      Are usually organic solids

  • 6. 
    Metamorphic rocks
    • A. 

      Are hard to break

    • B. 

      Are very rough

    • C. 

      Have visible lines or waves

    • D. 

      Are formed from cooled magma

  • 7. 
    The parent material of soil
    • A. 

      Comes from broken off bedrock

    • B. 

      Has lots of life in it

    • C. 

      Is organic

    • D. 

      Is humus

  • 8. 
    Soil erosion is increased if
    • A. 

      There are no plants or leftover crops in the soil

    • B. 

      The slope of the field is steep

    • C. 

      A and b are both correct

    • D. 

      The soil isn't compacted by machinery

  • 9. 
    The thickest layer is the
    • A. 

      Inner Core

    • B. 

      Outer Core

    • C. 

      Crust

    • D. 

      Mantle

    • E. 

      Bedrock

  • 10. 
    Most of the Earth's total volume is made up of
    • A. 

      The crust

    • B. 

      Rocks and minerals

    • C. 

      The Mantle

    • D. 

      The inner core

  • 11. 
    Healthy soil includes
    • A. 

      Stones

    • B. 

      No or very little air

    • C. 

      Loam

    • D. 

      Fresh or decomposed living things

  • 12. 
    Most of the internal heat of the Earth is located in the
    • A. 

      Sun

    • B. 

      Inner Core

    • C. 

      Mantle

    • D. 

      Outer Core

    • E. 

      Crust

  • 13. 
    Sedimentary rocks
    • A. 

      Have small rocks or sand in them

    • B. 

      Are rough

    • C. 

      Are easily broken

    • D. 

      All of the above

  • 14. 
    Rocks are like water because
    • A. 

      They both need to be created new once or twice a decade

    • B. 

      They both wear out

    • C. 

      They are both constantly "recycled"

    • D. 

      They both come from the core of the Earch

  • 15. 
    How was the Canadian Shield formed?
    • A. 

      By decomposition of forests

    • B. 

      By glaciers

    • C. 

      By soil erosion

    • D. 

      By earthquakes

  • 16. 
    Soil erosion
    • A. 

      Is a natural occurring process on all land

    • B. 

      Is caused by wind and water

    • C. 

      Is a quick noticeable process

    • D. 

      A and b are correct

  • 17. 
    Igneous rocks are
    • A. 

      Very smooth with visible speckles

    • B. 

      Rough with sand particles

    • C. 

      Very hard to break

    • D. 

      Both a and c are correct

  • 18. 
    The reason that the Earth's crust fractures in earthquakes is that
    • A. 

      Relative to the other layers the crust is cold so it is more brittle

    • B. 

      The Earth's crust can't withstand much shaking

    • C. 

      The crust is only a few centimeters thick

    • D. 

      It moves more than the other layers

  • 19. 
    When hot magma is pushed up towards the Earth's crust through a volcanoe, which type of rock is formed?
    • A. 

      Sedimentary rock

    • B. 

      Igneous rock

    • C. 

      Mineral rock

    • D. 

      Metamorphic rock

  • 20. 
    Soil erosion increases the amount of dust in the air which is a problem because
    • A. 

      Dust requires lots of repainting of barns and houses

    • B. 

      Dust is a cause of soil pollution

    • C. 

      Dust carries the organisms of infectious diseases

    • D. 

      All of the above

  • 21. 
    How thick is the Earth's crust?
    • A. 

      1-5km.

    • B. 

      5-40km

    • C. 

      5-45km

    • D. 

      About 15 km

  • 22. 
    We should all be concerned with soil erosion because
    • A. 

      Each year the economy loses money when the land is lost

    • B. 

      Each year the eroding soil carries pesticides and fertilizers into streams and lakes

    • C. 

      We have to cut down more trees to replace the lost soil

    • D. 

      Both a and b are correct

  • 23. 
    Why is soil important for life on Earth?
    • A. 

      It is used as a water reservoir

    • B. 

      Soil grows crops

    • C. 

      Soil is used as a filter for pollutants

    • D. 

      Both A and C are correct

    • E. 

      All of the above are correct

  • 24. 
    Soil erosion is caused by
    • A. 

      Land

    • B. 

      Water

    • C. 

      Fire

    • D. 

      Wind

    • E. 

      Both B and D are correct

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