Fossil Test Review

What is a hollow area in the sediment which shows the shape or a part of an organism

The Paleozoic, Mesozoic, and Cenozoic are divisions in the geologic time scale called _____.

The process by which all living things have changed over time is called

A fossil formed when minerals replace all or part of an organism is called a _____.

Information that Paleontologist gather & use to provide evidence of Earth’s history is

Radioactive decay occurs when atoms of an unstable element _____.

Law of superposition states that, in horizontal layers of sedimentary rock, each layer is...

A fossil characterized by a thin layer of carbon on a rock is

____ can provide clues about the activities of ancient organisms.

What is the solid copy of the shape of an organism

Present Day is part of what era?

Which is not a Period that Dinosaurs roamed Earth

Certain ammonites are used as this type of fossil because they lived for only a brief time.

What fossil is formed from an organism trapped in tar, ice or amber with little or no change

A fossil is ____.

This Era is sometimes referred to as the “Age of Reptiles.”

How do most fossils form?

Radioactive dating enables geologists to determine _____.

The relative age of a rock is _____.

The time it takes for one half of the atoms in a radioactive element to decay is

Geologic time begins with the long span of time called

What are fossils that were widely distributed but only lived during a short period of time

What statement identifies the number of years since the rock formed

A type of organism that no longer exists on Earth is said to be _____.

This fossil forms when dissolved minerals replace organic material & then harden to form rock.

Scientist that study fossils are called

What type of rocks do fossils usually occur

a gap in the geologic record where some rock layers have been lost because of erosion.

A rock layers age compared to the ages of other rock layers

The geologic time scale is a record of _____.