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Eighth Grade (Grade 8) Earth's Layers Questions

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Grade 8 Earth's Layers
The magnetic field that surrounds Earth is called the                      .
  1. magnetosphere
  2. magnetron
  3. magnetic domain
  4. magnetic polar region
Grade 8 Earth's Layers
Earth's outer layer is called the                .
  1. mantle
  2. crust
  3. outer plate
  4. shell
Grade 8 Earth's Layers
Which statement about Earth's magnetic field is true?
  1. When molten rock cools, the iron in it no longer contains magnetic domains.
  2. Earth's magnetic field extends about 10 m above Earth's surface.
  3. It is possible for Earth's magnetic field to reverse.
  4. A magnetic pole is permanent, but a geographic pole is not.
Grade 8 Earth's Layers
The inner core of the Earth is made of what?
  1. dense, solid materials
  2. gases
  3. liquid materials
  4. melted rocks
Grade 8 Earth's Layers
The inner core is completely                .
  1. solid
  2. liquid
  3. gas
  4. plasma
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