dinosaurs (2)
TRANSCRIPT
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.