U Science M2 2-2

The theory of ......................................explains that natural forces now shaping Earth have been doing it the same way

for billions of years.

• creationism

• natural selection

• catastophism

• uniformitarianism

Calculating the absolute age of a rock by measuring the amounts of parent and daughter materials in a rock and knowing the half-life of the parent material is called....................................... .

• radiometric dating

• radioactive decay

• half-life

• unconformity

The principle that Earth processes occurring today are similar to those that occurred in the past.

• superposition

• uniformitarianism

• catastrophism

• unconformity

...................................have been found in rock, amber, and ice.

• Fossils

• Unconformities

• Uniformitarianism

• Tephra

What is the principle of superposition?

• younger things are on the bottom and older things are closer to the top

• younger and older things are mixed up in the layers

• older things are on the bottom and younger things are near to the top

• none of the above

The principle that Earth processes occurring today are similar to those that occurred in the past.

• principle of superposition

• uniformitarianism

• catastrophism

• unconformity

.............................., in geology, the doctrine suggesting that Earth's geologic processes acted in the same manner and with essentially the same intensity in the past as they do in the present and that such uniformity is sufficient to account for all geologic change.

• Stability

• Uniformitarianism

• Theory of Conformity

Which of the following states that processes that we see in action today must be the same ones that shaped the earth long ago?

• Uniformity

• struggle for existence

• artificial selection

• uniformitarianism

Sedimentary rock that has fossil shells that were not destroyed by erosion or weathering before the sediment became rock is

• fossiliferous limestone.

• sandstone.

• lava.

• marble.

Fossils are found mainly in which type of rocks?

• igneous

• sedimetary

• metamorphic