Natural events and processes that occur today occurred in the past (rates may be different) is the concept of:paleontologyc. plate tectonics…

Natural events and processes that occur today occurred in the past (rates may be different) is the concept of:

a.     paleontology                    c. plate tectonics

b.    stratigraphy                     d. uniformatarianism

How is grain size (texture) related to the energy of the environment?

a.     as texture increases, energy of the environment decreases

b.    as texture increases, energy of the environment increases

c.     there is no relationship between texture and energy

Shale is sometimes black in color. A black color for rocks often indicates the presence of:

a.     chlorite                           c. microcrystalline quartz

b.    organic matter                 d. reduced iron oxides                       

Half-life is a unit of:

a.     distance                            c. heat

b.    time                                  d. particle speed

If a bone has a radiocarbon date of two half lives, how much C14 can be found in the bone?

a.     10%                                  c. 50%

b.    25%                                  d. 75%

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