Ground Laws and Fossils

Front

A technique used to determine the actual age of a fossil

Back

Absolute Dating

Front

Atoms of the same element that have different numbers of neutrons

Back

Isotope

Front

Scienctists have shown that Earth is how old?

Back

4.6 Billion Years

Front

When you sort organisms from oldest to youngest, you are applying ___________ principles

Back

Relative Dating

Front

A place where an old, eroded surface is in contact with a newer layer; represents a gap in the geologic time record.

Back

Unconformity

Front

The geologic principle that states in horizontal layers of sedimentary rock, the oldest layers are at the bottom and the youngest layers are at the top.

Back

Law of Superposition

Front

the remains or traces of organisms that have been preserved in rock.

Back

fossils

Front

The disturbance (fault/fold etc) is YOUNGER than the rock it cuts through

Back

The Law of Cross-Cutting Relationships

Front

States that sedimentary rocks are deposited in horizontal or nearly horizontal layers

Back

Law of Horizontality

Front

rock that is made from hardened magma (or lava) from the mantle of the earth

Back

Igneous