Chapter 11 & 12 Review

What is a principal that states that geologic processes that occurred in the past can be explained by current geologic processes.

• Catastrophism

• Unconformity

• Uniformitarianism

• Angular Unconformity

A principle that states geologic change occurs suddenly.

• Catastrophe

• Castrophism

• Uniformitarianism

• Uniform

Check all of the examples of catastrophism

• weathering

• erosion

• tornado

• volcanic eruption

• hurricane

Check all examples of uniformitarianism

• erosion

• weathering

• tectonic plate movement

• deposition

• volcanic eruption

Any method of determining whether an event or object is older or younger than other events or objects.

• Relative Dating

• Absolute Dating

• Isotope

• Speed Dating

Any method of measuring the age of an event or object in years.

• Absolute Dating

• Relative Dating

• Speed Dating

• Isotope

The process in which a radioactive isotope tends to break down into a stable isotope of the same element or another element.

• Radioactive Decay

• Isotope

• Half-life

• Full-life

The scientific study of fossils.

• Geology

• Paleontology

• Biology

• Anthropology

A method of determining the age of an object by estimating the relative percentages of a radioactive isotope and a stable isotope.

• Half-life

• Radiometric dating

• Isotope

• Periodic Table of the Elements

The time needed for half of a sample of a radioactive substance to undergo radioactive decay.

• isotope

• half-life

• full-life

• biological decay