Divisions
Extinctions
Explosions
Life
Evolution
100

The remains of an organism that existed over large regions of Earth for a short period of time.

Index Fossil

100

the dying off of many different species of organisms over a short period of time.

What is a mass extinction?

100
single-celled, blue-green algae thought to be one of the earliest known, ancient organisms.
What are Cyanobacteria?
100
animals with backbones
What are vertebrates?
100
these organisms rely on their surroundings and behavior to help them regulate their body temperatures
What are ectotherms?
200

Geological time periods end and begin according to major events affecting organisms of the time are called:

Mass Extinctions

200

When happens to a species when it is unable to adapt to a new environment

extinction

200
True or False The Precambrian age represents 88% of Earth's history.
What is true.
200
True or False Invertebrates, like jellies, sponges and corals also evolved during the Cambrian explosion.
What is true.
200
these organisms generate internal body heat to maintain a constant body temperature
What are endotherms?
300

The 4 main sections of geological time the Earth's history is divided into are called:

Eras

300

True or False There is evidence that some mass extinctions were caused by sudden changes in climate.

What is true. Species that are unable to survive a change in climate become extinct.

300
The absence of ________________ during the Precambrian time suggests there was no ozone layer.
What is oxygen?
300
An organism that evolved during the Pennsylvanian period that could lay its eggs on land.
What is an amniote?
300
True or False Gymnosperms produce seeds but no flowers and dominated the Mesozoic era.
What is True
400

Eras are broken into shorter sections of times called ___________.

Periods

400

Possible catastrophic events which cause mass extinction could be:

Volcanic Activity

Asteroid/ Meteorite Impact

Climate Change

400
Evidence from the Cambrian explosion shows the number of animals with _____________________ increased rapidly.
What is shells
400
True or False Plants moved on land during the Devonian period.
What is false. Ordovician period
400
Which of the following began the Mesozoic era? A. the break up of Pangaea B. formation of continental ice sheets C. melting of European glaciers D. extinction of dinosaurs
What is A. the break up of Pangaea
500

Most of all Earth's history happened during this geological time era called:

Precambrian

500

Generally, the geological time scale offers a record of what?

Earth's history

500
_________________________, animals with hard outer skeletons were the most commonly fossilized organisms of the Cambrian period.
What are Trilobites?
500
Which statement is true about the evolution of Bony Fish? A. One group had thin, bony rays which supported their fins and the second group had thick fins supported by large bones and muscles. B. One group had gills for oxygen. The second group absorbed oxygen directly from the water. C. Both A and B.
What is A. One group had thin, bony rays which supported their fins and the second group had thick fins supported by large bones and muscles.
500
After a mass extinction, life forms evolved because of which reason? A. New niches were created. B. Old niches were left empty. C. Temperature changes always cause changes. D. Global temperatures increased.
What is B. Old niches were left empty.
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