Upgrade to remove ads
Only $2.99/month

Earth History Test

Terms in this set (15)

The age of the universe
13.7 billion years
The age of earth
4.7 billion years
The age of bacteria
3.5 billion years
The age of algae
1.5-2.0 billion years
The age of the complex multicellular life
600 million years
The age of human ancestors
2 million years
What does a cladogram show
How related animals are. Common ancestors. Shared derived characters
What are the 7 groups used to classify things
Kingdom
Phylum
Class
Order
Family
Genus
Species
Geology
The scientific study of the origin, history, and structure of the solid matter of the earth
Sedimentary rock
A rock formed by hardened sediment which was deposited in layers at the bottom of the sea
Plate tectonics
The dynamics of continental plate movement of the earth
Isotopes
Any two or more forms of a chemical element having the same number of protons in the nucleus but having different numbers of neutrons in the nucleus
Half life
The time required for one half the atoms of a given amount of a radioactive substance to disintegrate
Radioactive decay
Spontaneous disintegration of a radionuclide accompanied by the emission of ionizing radiation in the form of alpha or beta particles or gamma ray
Species
A group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding
THIS SET IS OFTEN IN FOLDERS WITH...