0
There have been five massive extinctions which the earth has faced beginning with the end of the Cretaceous period, and there have been approximately 11 lesser extinctions in addition to the big five.
Wiki User
∙ 10y ago
Wiki User
∙ 13y agoi think about 10 raised to the power 11
Add your answer:
Earn +20 pts
How many major plate are there?
There are altogether seven major plates on earth
When was the last mass extinction?
The Cretaceous–Tertiary extinction event 65 million years ago was the last mass-extinction, and many believe that humans are causing a mass-extinction right now.
How did earth's organisms change during the first period of Paleozoic era?
increased oxygen in the atmosphere caused the extinction o many single-celled organisms.
What was the positive result of the dinosaur extinction?
The extinction of the dinosaurs is one of the many events that allowed humans to evolve. After the dinosaurs died out, mammals began to occupy the world they left behind. Mammals grew and diversified, spreading throughout the Earth, and eventually giving rise to humans.
How many primary plates make up the Earth's surface?
There are 12 major plates.
How many major extinction events have occurred during the Earth's history?
five
What are the keywords for the major extinction of dinosaurs?
Meteor, extinction, atmosphere, death. There's a lot more... too many to name.
What is the a period of time called when many species disappeared?
A major extinction event.
When the earth was hit by a asteroid did it have a affect on the earth?
Asteroids have hit the Earth that have brought about the extinction of nearly every animal and many of the plants on earth.
How many years did Neanderthals live on earth before extinction?
Neanderthals first appeared around 400,000 years ago and went extinct about 40,000 years ago, so they lived on Earth for approximately 360,000 years.
How many episodes in the starz original series the pillars of the earth?
4 90 minute episodes, or 8 45 min episodes
How many episodes of planet earth live are thay?
5
What do paleontologists find in the evidence after a major extinction occurs?
many new species often appear at the same time
How many times higher is the estimated rate of extinction for the species now compared to before humans appeared on earth?
1000
How Many major climates are on Earth?
3
Although many are threatened with extinction approximately how many species of mammals exist on earth today?
4,600,000 INCORRECT PCH 4,600 PCH CORRECT
How many major plate are there?
There are altogether seven major plates on earth
