Section 1
Section2
Section 3
Vocab 1
Vocab 2
100
A species of index fossil that lived over vast areas of the world during a specific time period. (some of these have no eyes)
What is a trilobite?
100
These evolved from amphibians
What are reptiles
100
Most lifeforms of this era were dinosaurs.
What is the Mesozoic Era?
100
Cone-bearing plants without any flowers.
What are gymnosperms?
100
animals that lived on land but returned to water to reproduce.
What are amphibians?
200
Three factors in the environment or surroundings that woudl cause a species to change.
What is a change in climate, change in habitat, and more predators?
200
Blue-green bacteria thought to be one of the earliest forms of life that produced oxygen
What is cyanobacteria?
200
Most recent Era
What is the Cenozoic Era?
200
Flowering plants
What are angiosperms?
200
animals without a backbone
What are invertebrates?
300
The Era on the Geologic Time Scale that is divided into both periods and epochs.
What is the Cenozoic Era?
300
These evovled from fish
What are amphibians?
300
Name the three periods of the Mesozoic Era
What is the Triassic, Jurassic, and Cretaceous period?
300
Animals with a backbone
What is a vertebrate?
300
division of Earth's history into smaller units
What is the geologic time scale?
400
A group of organisms that reproduce only with members of their group.
What is a species?
400
This ended the Paleozoic Era
What is the formation of Pangea?
400
The two divisions of Pangaea.
What is Laurasia and Gondwanaland?
400
Organisms used to identify specific geologic time periods.
What are index fossils?
400
The earliest life-forms on earth
What are cyanobacteria?
500
The division of Earth's history into time units.
What is the geologic time scale?
500
Most life forms of this era lived in the ocean
What is the Paleozoic Era?
500
Name our current era and period
What is the Quarternary Period and Cenozoic Era?
500
Process by which certain organisms survive and reproduce
What is natural selection?
500
group of organisms that normally reproduce only among themselves
What is a species?
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