The Mesozoic era By travis Ala

Different pictures of dinosaurs

The mesozoic era is divided into 3 periods: the Triassic, the Jurassic, and the Cretaceous periods

The Triassic period

The reptiles successful in the mesozoic era that it is called the age of the reptiles

The first dinosaurs appeared 225 million yeas ago during the Triassic period

Mammals first evolved in the Triassic period

These mammals were about the size of a mouse

The jurassic period

The dinosaurs became common on land

Other dinosaurs evolved like ones that live in the sea and in the air

Flying reptiles

Scientists have identified several hundred types of dinosaurs

Many scientists think that birds evolved from dinosaurs

The Cretaceous period

The reptiles were still widespread

Birds began to replace flying reptiles

Th flying reptiles became extinct

Flowering plants first evolved in the Cretaceous period

The seeds in the fruit helped them to spread better

A mass extinction in the Cretaceous period

This mass extinction happened about 65 million years ago at the close of tele Cretaceous period

Scientists hypothesize that this happened when an asteroid hit the earth

This wiped out more than half of the animal groups on earth. Including the Dinosaurs

When the asteroid hit the earth it threw dust up into the air that blocked the sunlight for years

Without the sunlight the plants died and the plant eating animals starved

My sources

With some help from pic collage


Created with images by libertygrace0 - "Dinosaur" • Efraimstochter - "dino dinosaur tyrannosaurus rex" • miniformat65 - "birds spring dress goliath" • State Farm - "Meteor falling to Earth"

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