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Mass extinctions--at least two--one at the end of the Permian, and one at the end of the Cretaceous, with numerous other less severe events. As far as the extinction of individual species, that list would cover millions of extinct organisms.
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What has caused most of the mass extinctions on earth?
Mass extinctions are caused by rapid, global changes. Usually these are changes in climate. Without the right temperatures and precipitation, plants that animals depend on die out, which wipes out the animals. Examples include the Permian-Triassic Extinction, where volcanoes in what is now Siberia caused intense global warming, wiping out over 90% of species, and the K-T Extinction, where an asteroid impact suddenly blocked sunlight for months or years, killing off the dinosaurs and many other organisms.
What is the the study of the Earth's past called?
Earth science is the study of all things related to planet Earth, including its history. Geology is primarily concerned with the solid Earth, its rocks, and the processes by which they change. Oceanography is concerned with changes to the water masses. Meteorology is concerned with atmospheric and climatic changes. Biology is concerned with the Earth's living organisms. Natural history typically refers to biologic history, but can also be applied to geological, oceanographic and meteorological history as well.
How many families are on the earth?
how many families of at least two people living together are on the earth
How many different types of earth worms are there?
an earth worm is a type of worm.There a no types of earth worms
How many earth planets fit into the moon?
The Moon is a lot smaller then the Earth.
How many ice-ages have you had in the history of earth?
It is not known exactly how many ice ages Earth has experienced, but a reasonable estimate would be at least 20 known events and probably many more.
How many major extinction episodes has Earth seen in its time?
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.
Why many scientists believe that something other than asteroids have caused most of the catastrophic extinctions of the Earth's past?
Well because there is no proof.
What warning sings were missed by the people of Pompeii?
Pompeii had experienced many earth tremors before the fatal eruption. Also the water supply began dropping. The smart ones got out.Pompeii had experienced many earth tremors before the fatal eruption. Also the water supply began dropping. The smart ones got out.Pompeii had experienced many earth tremors before the fatal eruption. Also the water supply began dropping. The smart ones got out.Pompeii had experienced many earth tremors before the fatal eruption. Also the water supply began dropping. The smart ones got out.Pompeii had experienced many earth tremors before the fatal eruption. Also the water supply began dropping. The smart ones got out.Pompeii had experienced many earth tremors before the fatal eruption. Also the water supply began dropping. The smart ones got out.Pompeii had experienced many earth tremors before the fatal eruption. Also the water supply began dropping. The smart ones got out.Pompeii had experienced many earth tremors before the fatal eruption. Also the water supply began dropping. The smart ones got out.Pompeii had experienced many earth tremors before the fatal eruption. Also the water supply began dropping. The smart ones got out.
Anything noteworthy today in history 24th of November?
Many noteworthy things have happened in history in November 24th. In 1954, France sent 20,000 soldiers to Algeria. In 1969, Apollo 12 returned to Earth. In 1966, New York City experienced the smoggiest day in the history of the city.
What era had many extinctions because of large variations in climate?
Paleozoic
Which era had many extinctions because of large variations in climate?
Paleozoic
What has caused most of the mass extinctions on earth?
Mass extinctions are caused by rapid, global changes. Usually these are changes in climate. Without the right temperatures and precipitation, plants that animals depend on die out, which wipes out the animals. Examples include the Permian-Triassic Extinction, where volcanoes in what is now Siberia caused intense global warming, wiping out over 90% of species, and the K-T Extinction, where an asteroid impact suddenly blocked sunlight for months or years, killing off the dinosaurs and many other organisms.
How many galactic years have earth experienced?
approximately 20 earth is between 4.5 and 4.6 years old and a galactic year is, on average, 226 million years
How many major extinction events have occurred during the Earth's history?
five
In art history what does the term renaissance describe?
It is used to describe the phase of European History because many of the changes experienced between the 14th and 16th centuries were inspired by revival of the classical art and Intellect of Ancient Greece and Rome.
How many earthquakes happen in NY in the year 2009?
There were no earth quake's in NY in the year 2009. Although there is a history of earth quake's in different year's there. See the related link to the history of Earth Quakes in New York.
