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Twelfth Grade (Grade 12) Geology Questions

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Grade 12 Earth's Layers
The Earth's core is made of                    .
  1. carbon and iron
  2. helium and hydrogen
  3. nickel and iron
  4. carbon and helium
Grade 12 Soil
The smallest particle of soil is known as
  1. sand
  2. silt
  3. loam
  4. clay
  5. humus
Grade 12 Tectonics
Grade 12 Tectonics
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 Tectonics
Subduction tends to form
  1. gyres.
  2. trenches.
  3. ridges.
  4. plates.
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 Tectonics
The Richter scale
  1. is not as accurate as the Mercalli scale
  2. is based on vibrations of the air
  3. measures of the strength of a seismic wave
  4. measures heat
Grade 12 Soil
Grade 12 Tectonics
Surface waves transport energy
  1. by compression and expansion
  2. by shearing
  3. in a motion similar to ocean waves
  4. in a random motion
Grade 12 Tectonics
Primary waves travel
  1. faster than surface waves
  2. slower than secondary waves
  3. at the same rate as surface waves
  4. slower than surface waves
Grade 12 Historical Geology
Which of these is NOT a reason many scientists believe we are coming out of an ice age?
  1. there are higher levels of carbon dioxide
  2. there are fewer glaciers
  3. the temperature at the poles is warming
  4. the ocean levels are falling
Grade 12 Historical Geology
During an ice age
  1. continents sink deeper into the asthenosphere
  2. continents float higher on the asthenosphere
  3. the oceans rise
  4. higher latitudes are warmer than lower latitudes
Grade 12 Earth's Layers
The hot springs of Iceland are created due to
  1. divergent plate boundaries
  2. absorption of the sun's heat on its dark rock surfaces
  3. plutons
  4. man-made heating units
Grade 12 Historical Geology
The polarity pattern of the ocean crust along the Mid-Atlantic Ridge helped scientists determine
  1. where to find fossils
  2. the sediment thickness of the ocean floor
  3. how magnets work
  4. the age of the oceanic basalt
Grade 12 Rocks
A rock that would most likely contain a fossil would be:
  1. igneous
  2. sedimentary
  3. volcanic
  4. metamorphic
  5. topsoil
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