Page 144 - Science Course 3 (Book 2)

The Mesozoic Era Mo11-L6a: Major Events During the
Mesozoic Era
Lesson 6

Mesozoic

Triassic Jurrasic Cretaceous
In this topic, you will learn the following
lessons:
Mo.11–L6a: Major Events During the Mesozoic
Era
Mo.11–L6b: Fossil Evidence About Mesozoic
Era

Major Events During the Paleozoic
Mo11–L6a
Era
KEY CONCEPTS:
1. What major geologic events occurred during the
Mesozoic era? 251.0 201.6 145.5 65.5
mya mya mya mya

Vocabulary A-Z The breakup of Pangaea was the dominant geologic
Let us learn some vocabulary event of the Mesozoic era.

Pangaea began to break apart in the Late Triassic.
dinosaur
Triassic
dominated Mesozoic land vertebrates that walked
with their legs positioned directly below their hips. 200 mya

Eventually Pangaea
split into two sepa-
rate landmasses —
Gondwanaland and
Laurasia.

Temperature as a Function of Latitude

Celcius Mesozoic Fahrenheit

40 Temperature 104
30 86
20 68
Present
Let’s Begin 10 Temperature 50
0 32
Geology of the Mesozoic Era –10 14

–20 –4
The Mesozoic era lasted from 251 million years ago
(mya) to 65 mya. –30 –22
–40 –40
It is divided into three periods: the Triassic, the
Jurassic, and the Cretaceous. 90 60 30 0 30 60 90
South Latitude North

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