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Twelfth Grade (Grade 12) Geology Questions

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Grade 12 Earth's Layers
Earth's core is made of                    .
  1. carbon and iron
  2. helium and hydrogen
  3. nickel and iron
  4. carbon and helium
Grade 12 Tectonics
A tectonic plate segment includes
  1. all of the mantle.
  2. the crust and the asthenosphere.
  3. the upper mantle and the crust.
  4. the mantle and the core.
Grade 12 Tectonics
Many of Earth's strongest earthquakes occur in                     .
  1. spreading centers
  2. subduction zones
  3. divergent boundaries
  4. ocean ridges
Grade 12 Tectonics
Subduction tends to form
  1. gyres.
  2. trenches.
  3. ridges.
  4. plates.
Grade 12 Earth's Layers
Grade 12 Tectonics
The plate tectonics theory states that
  1. continental crust "plows through" oceanic crust.
  2. oceanic crust "slides over" continental crust.
  3. lithospheric plates move.
  4. tectonic forces cause the most damage in the center of the plates.
Grade 12 Earth's Layers
Earth's layers, listed from LEAST to MOST dense, are                     .
  1. core, crust, mantle.
  2. core, mantle, crust.
  3. mantle, core, crust.
  4. crust, mantle, core.
Grade 12 Rocks
The majority of rocks in the crust are
  1. sedimentary.
  2. metamorphic.
  3. igneous.
  4. volcanic.
  5. topsoil.
Grade 12 Tectonics
Grade 12 Tectonics
A sudden motion of the earth is called                 .
  1. fault vibrations
  2. an earthquake
  3. seismic cracking
  4. refraction waves
Grade 12 Tectonics
In comparison to earthquakes at subduction zones, earthquakes at divergent boundaries tend to be
  1. shallower and less intense.
  2. deeper and less intense.
  3. deeper and more intense.
  4. shallower and more intense.
Grade 12 Tectonics
Subduction is
  1. where denser plates sink into the mantle.
  2. where ridge valleys form.
  3. occurring mostly in the Atlantic Ocean.
  4. occurring where continental plates diverge.
Grade 12 Earth's Layers
The two main reasons Earth's interior is hot are Earth's natural radioactive decay and
  1. accumulated solar heat.
  2. Earth used to be much closer to the sun during the Archean.
  3. heat from Earth's original formation.
  4. none of the above
Grade 12 Tectonics
Long term earthquake predictions are best at predicting
  1. where an earthquake is likely to occur.
  2. how much damage the next earthquake will cause.
  3. when the next earthquake will occur.
  4. how long the next earthquake will last.
Grade 12 Earth's Layers
Layers in the mantle are created by variations in strength due to which reason?
  1. increasing pressure and temperature with depth
  2. changes in the elements the mantle is composed of
  3. increase in friction with depth
  4. all of the above
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