Earth's History - Revised

How long it takes for one-half of a radioactive sample to decay

Rapid events can cause sudden change to Earth's surface.

Determines the actual age of an event or object

Organism dies and there is no filling of the cavity with minerals

Determining whether an object is younger or older than another

What type of fossilization occurs when the whole animal is preserved?

Which type of fossil narrows down the age of a rock layer because it had a short life span?

What is this a picture of?

Preserved feces, or dung, from animals

Another name for absolute dating

Which type of fossilization process leaves behind a dark film on a sedimentary rock?

The breaking down of unstable isotopes into stable isotopes

Evidence of an animal's activity usually found in sedimentary rock

The same geologic processes that shape Earth today have been at work throughout Earth's history

Which is an example of uniformitarianism?

What is this a picture an example of?

What is this an example of?

Preserved remains of animals, plants, and other organisms from the remote past

What is this an example of?

How was this fossil preserved?

Which is an example of catastrophism?

Which does NOT provide evidence of Earth's climate?

How was this type of fossil preserved?

Organizes Earth's history based on major events.

Determines the age by comparing ratio of parent to daughter isotopes in a sample

Occurs when the organism's tissues are completely replaced by minerals

Atoms of an element that have the same number of protons, but different number of neutrons