C3 Review Questions
  1. Complete this concept map on how rocks are classified.
The classification of rocks.

Answer:

The classification of rocks.
  1. Please match each term from column A with the most appropriate item from column B:
    2. Number COLUMN A COLUMN B
         
    4 intrusive igneous rock 1) size, shape, and arrangement of crystals
    6 organic sedimentary rock 2) squeezing layers of sediment together
    1 texture 3) dissolved minerals that come out of solution
    7 foliated 4) formed under the Earth"s surface
    2 compaction 5) localized exposure to heat from magma
    5 contact metamorphism 6) from remains of once-living creatures
    3 chemical sedimentary rock 7) bands of minerals

  2. Distinguish between:

    1. intrusive and extrusive igneous rocks
      2. Intrusive igneous rocks are formed under the Earth"s surface and possess large crystals. Extrusive igneous rocks are formed on the Earth"s surface and possess small crystals that are not visible to the naked eye.

    2. compaction and cementation
      3. Compaction refers to the weight of many layers of sediment causing solid rock to form. Cementation refers to dissolved minerals acting as a form of glue between the particles in sediment.
  3. Why will metamorphic rocks not form if the temperature is much in excess of 1,200° C (2,192° F)?
    4. Rock will melt and become magma at these temperatures.