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Ninth Grade (Grade 9) Earth's Layers Questions

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Grade 9 Earth's Layers
What part of the Earth contains rocks?
  1. Biosphere
  2. Hydrosphere
  3. Atmosphere
  4. Lithosphere
Grade 9 Earth's Layers
What is one reason that the Earth's core is so hot?
  1. Coal and oil burn in the core.
  2. As heavy elements in the core decay, they produce radioactive heat.
  3. The Sun heats up the Earth and causes the inside to melt.
Grade 9 Earth's Layers
What caused Earth to develop layers as it cooled?
  1. differences in density
  2. the magnetic field
  3. escaping gases
  4. the speed of rotation
Grade 9 Earth's Layers
What is one reason that the Earth's core is so hot?
  1. Coal and oil burn in the core, creating a giant furnace
  2. As heavy elements in the core decay, they produce radioactive heat.
  3. The Sun heats up the Earth and causes the inside to melt
  4. When any planet reaches a certain size, it becomes hot inside.
Grade 9 Earth's Layers
The temperature at the earth's core is about
  1. 6,000 Degrees Celsius
  2. 100 Degrees Celsius
  3. 600 Degrees Celsius
  4. 60,000 Degrees Celsius
Grade 9 Earth's Layers
The magnetic field is probably generated by
  1. the tilt of the Earth's rotational axis
  2. the solar wind
  3. fluid movements in the outer core
  4. deformation of the asthenosphere
  5. a large deposit of magnetite at the North Pole
Grade 9 Earth's Layers
Which of the following layers of the Earth is responsible for the magnetic field?
  1. Crust
  2. Upper Mantle
  3. Inner Core
  4. Outer Core
  5. Lower Mantle
Grade 9 Earth's Layers
The core of the earth is composed primarily of
  1. iron and sulfur
  2. iron and nickel
  3. nickel and cobalt
  4. none of these
  5. silicon and oxygen
Grade 9 Earth's Layers
What is the partially molten layer of Earth called?
  1. the hydrosphere
  2. the asthenosphere
  3. the biosphere
  4. the lithosphere
Grade 9 Earth's Layers
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