dinosaurs (2)

1. Introduction

• 1.1 Dinosaurs• 1.2 Necessities and characteristics• 1.3 Description of period and habitat.

2. Theories

• Asteroid theory• Vulcan theory• Ice age theory• Climate theory

3. Conclusion

Type of animal:

Dinosaurs are a group of reptiles.

Dinosaurs had their heyday in the Mesozoic Era.

Metabolism: cold blooded or warm blooded?

Expectation of life: we don´t know it

Nutrition: carnivores and herbivores stay in a relatively stable equilibrium

Main habitat and climate

Interaction and adaption

1. In which era did dinosaurs lived?

2. How was the climate in the dinosaurs period ?

3. How was the metabolism of dinosaurs?

Asteriods Theory

Vulcan theory

Ice age theory

Climate Theory

Where ?

Yucatan peninsula

What ? Asteroid suppousdly coming from Jupiter or Mars.

Evidences:

External metals found near the dinosaurs fossils.

Consequences

Nuclear winter

The end of the Cretaceous period

There was an increased of volcanic activity

Sulfur dioxide in the air

As a consequence a climatic change

Catastrophes shielded the earth suface from sunlight.

As dinosaurs were thought to be cold blooded, they survival was hard

Herbivores dinosaurs Low quantity of plants Extinction of dinosaurs

After previous catatrophies the world climate became warmer by as much as 10cº

Main problems: Volcans and Sea level.

Sudden change or gradual change.

1. Which were the main problems in which the climate theory was based on?

2. Why the earth was shielded blocking the sunlight?

3. What produced the huge clouds of sulfur dioxide into the air ?

Lack of resources from the earth.

The most common theory is the asteriod theory.

Not all the living things disappear .

The main problem after the different catastrophies was the climate change.

After the extinction of dinosaurs the living things that survive try to evolve.