Geologic Eras - Miss Hamilton



Geologic Eras

The earth can be divided into four main geologic eras. An era is a span of time in the earth’s history where significant geologic events occurred.

The four eras are:

1) ______________________

2) ______________________

3) ______________________

4) ______________________

Precambrian- “The oldest and longest”

• Began ________ billion years and lasted for 4 billion years

• Accounts for ________ of the earth’s history

• The Bedrock of Canada was formed

• Only part of Canada that existed was the ________________

• By the end of this era the first ________________ organisms had appeared (________________________________________________________)

Paleozoic- “Age of the Fish/Amphibians”

• Last ________ million years

• North America was located near the ________________

• ________________ covered the now, Interior Plains of Canada

• Swamps produced ________ and natural ________

• ________________ mountains were formed

• Fish, insects first appeared in the beginning of this era and ________________ were found at the end of the era

• ________________ appear on land

Mesozoic- “Age of the Dinosaur”

• Lasted ________ million years

• ________________ were formed

• ________ covered large parts of North America

• Dinosaurs and other reptiles roamed through huge ________ and forests

• First ________ plants appear

• First birds and ________________ appear

• ________________ mountains are formed

• ________________ marks the end of the Mesozoic era

Cenozoic- “Age of Humans”

• Current geologic era

• Ice ________covered much of North America

– “Ice Age”=Glaciers

• Formation of Rocky Mountains ________________

• ________________develop

• ________________ forms of life evolve ________________________________

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download