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Twelfth Grade (Grade 12) Earth Science 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 tends to form
  1. gyres.
  2. trenches.
  3. ridges.
  4. plates.
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
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 Oceanography and Hydrology
Giant whirlpool-like currents out in the ocean
  1. Maelstroms
  2. Gyros
  3. Tidal Pools
  4. Gyres
Grade 12 Soil
Grade 12 Oceanography and Hydrology
Grade 12 Environmental Science
What determines the number after the E in the abbreviation of ethanol?
  1. The amount of people who use it.
  2. The amount of corn in the fuel.
  3. The amount of gasoline in the fuel.
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
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