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Twelfth Grade (Grade 12) Geology Questions

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Grade 12 Tectonics
Subduction tends to form
  1. gyres.
  2. trenches.
  3. ridges.
  4. plates.
Grade 12 Rocks
A rock that would most likely contain a fossil would be:
  1. igneous
  2. sedimentary
  3. volcanic
  4. metamorphic
  5. topsoil
Grade 12 Rocks
The smallest particle of soil is known as
  1. sand
  2. silt
  3. loam
  4. clay
  5. humus
Grade 12 Rocks
The majority of rocks in the Earth's crust are
  1. sedimentary
  2. metamorphic
  3. igneous
  4. volcanic
  5. topsoil
Grade 12 Geomorphology
Grade 12 Earth's Layers
The most common element in the earth's crust is:
  1. oxygen
  2. carbon
  3. hydrogen
  4. iron
  5. silicon
Grade 12 Geomorphology
Grade 12 Historical Geology
Which of the following periods was the age of the fishes?
  1. Silurian
  2. Cretaceous
  3. Jurassic
  4. Triassic
  5. Devonian
Grade 12 Geomorphology
In a cave, where would one find a stalactite growing?
  1. From the cave floor
  2. From the cave wall
  3. From the cave ceiling
  4. Under the cave
Grade 12 Tectonics
A tectonic plate segment includes the                                .
  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 Rocks
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 Tectonics
Grade 12 Earth's Layers
It is hypothesized 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 Tectonics
Many of the Earth's strongest earthquakes occur in                     .
  1. spreading centers
  2. subduction zones
  3. divergent boundaries
  4. ocean ridges
Grade 12 Earth's Layers
The two main reasons the Earth's interior is hot are the Earth's natural radioactive decay and
  1. accumulated solar heat
  2. the Earth used to be much closer to the Sun during the Archean
  3. heat from the Earth's original formation
  4. none of the above
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