The Timeline of Dinosaurs

Review Questions

What are the three periods we group the existence (life) of Dinosaurs into?

A) Triceratops, Allosaurus, Stegasaurus

B) Australia, Asia, Europe

C) Triassic, Jurassic, Cretaceous

The Timeline of Dinosaurs

Review Questions

Bonus Question

What Was the Earth called when it was all one landmass?

What is one scientific theory that explains the extinction of Dinosaurs?

A) Jurassic

B) North America

C) Pangea

A) The Earth lost its Sun

B) An asteroid crashed into the planet

C) They ran out of Oreos

The Beginning of Dinosaurs

What Did the Earth Look Like During the Jurassic Period?

What Did the Earth Look Like During the Triassic Period?

What Did the Earth Look Like During the Cretaceous Period?

The Earth began to break into the 7 continents that exist today

Pangaea split into northern and southern landmasses in the Jurassic Period, divided by the ocean. In time, the two new continents moved apart.

Dinosaurs walked the planet for about 165 million years, during a time in the Earth’s history called the Mesozoic Era (Middle Life).

In the Triassic Period all land was joined together as one great landmass.

Scientists call this super-continent Pangaea, which means “All Earth”.

What are the 7 continents?

Why is the Time of Dinosaurs called Middle Life?

Ferns and mosses grew on the ground, but there were still no flowering plants or grass

Exactly How Long Were Dinosaurs Here?

Flowering plants appeared, which were the ancestors of today’s herbs, flowers, and broad-leaved trees. They became the main type of plant-life. Oak, maple, walnut, magnolia, and beech trees grew alongside the many tree ferns

There was no grass, and there were no flowering plants.

Inland areas were covered in hot, barren deserts with little or no plant life.

When we compare that to ourselves, Humans have lived on the Earth for less than 2 million years.

145 million years ago

200 million years ago

65 million years ago

250 million years ago

The Cretaceous Period

The Jurassic Period

The Triassic Period

The third and final period of Dinosaurs is called the Cretaceous Period

The Second Period of Dinosaurs is called the Jurassic Period

Dinosaurs lives here on Earth can be grouped into 3 different Periods

The Cretaceous Period began 145 million years and ended 165 million years ago.

The First Period is called the Triassic Period

The Jurassic Period began 200 million years and ended 145 million years ago.

Review Questions

The Triassic Period began 250 million years ago and ended 200 million years ago

Dinosaurs colonized (ruled) the land, from huge plant-eating species to smaller meat-eating ones. The first birds appeared, and horseshoe crabs swam in the seas.

How Long Did Dinosaurs live on the Earth?

Fierce predatory dinosaurs hunted and scavenged for meat. Plant-eating dinosaurs grew body armor for protection. Crocodiles, turtles, and lizards flourished, and the first snakes appeared. Insects and birds flew in the sky, and small mammals ran on the ground.

The first dinosaurs lived in the early Triassic. Other reptiles also lived in this period, fish and turtles swam in the sea, and the first mammals appeared.

A) 165 Million Years

B) 2015 years

C) 2 million years