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The most famous of course is the extinction of the Dinosaurs 65 million years ago in the Cretaceous - Tertiary period.
Prior to that there was the Triassic - Jurassicextinction about 205 million years ago. Although this is a disputed impact extinction, it is still one of the theories.
The most devastating was the Permian - Triassicextinction 250 million years ago in which 96% of all marine species and 70% of all land species were killed including insects. This extinction event is believed to be a series of small extinctions over time or 2 large extinctions , there are several theories from climate change to impact.
The further back you go the harder it is to estimate extinctions because of the lack of fossil records but two more that are listed are.
The late Devonian extinction 360-375 million years ago, again a disputed impact event, but a comet or meteor is among the favoured.
And Ordovician - Silurian extinction 440-450 million years ago.
Some notable extinctions believed to have been caused by meteors include the Permian-Triassic extinction event around 252 million years ago, which wiped out over 90% of marine species, and the Cretaceous-Paleogene extinction event around 66 million years ago, which led to the extinction of the dinosaurs. These extinctions were likely triggered by large meteor impacts causing sudden and catastrophic environmental changes.
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What kind of threats do they pose to earth?
Asteroids and meteors can pose a threat to Earth by potentially colliding with our planet, causing significant damage and destruction. Some impacts have the potential to create tsunamis, wildfires, and even lead to mass extinctions. It is important to continue monitoring these celestial objects and developing strategies to mitigate any potential impact risks.
Is meteors made up of ice dust gus?
Meteors are typically solid pieces of rock or metal that enter Earth's atmosphere and burn up due to friction, creating a bright streak of light. Some meteors may contain some ice, but the overall composition is more likely to be rock or metal. Dust and gas can also be present in meteors, but they are not the primary components.
What are comets and meteors made of?
Comets and meteors are made of rocks and boulders same as on earth. But since they are in space for a long time, they might have some differences, little differences.
What is a group of meteors?
It is a shower of meteors.
Does Neptune have any meteors?
All planets will experience some meteor hits.
How is it affect to earth's environment when meteor hit the earth?
That depends on the size of the meteor, and also the impact speed, which may vary. Smaller meteors hit the Earth every day. Larger ones can cause mass extinctions. For example, it is believed that the mass extinction 65 years ago, which basically eliminated the dinosaurs, was due to a large meteor.That depends on the size of the meteor, and also the impact speed, which may vary. Smaller meteors hit the Earth every day. Larger ones can cause mass extinctions. For example, it is believed that the mass extinction 65 years ago, which basically eliminated the dinosaurs, was due to a large meteor.That depends on the size of the meteor, and also the impact speed, which may vary. Smaller meteors hit the Earth every day. Larger ones can cause mass extinctions. For example, it is believed that the mass extinction 65 years ago, which basically eliminated the dinosaurs, was due to a large meteor.That depends on the size of the meteor, and also the impact speed, which may vary. Smaller meteors hit the Earth every day. Larger ones can cause mass extinctions. For example, it is believed that the mass extinction 65 years ago, which basically eliminated the dinosaurs, was due to a large meteor.
When geologist refer to the big five what are they referring to?
When geologist refer to the Big Five they are referring to the five mass extinctions on Earth. Some of these extinctions are the Paleozoic and Mesozoic eras.
Does the atmosphere protect us from meteors?
It does to some extent. Rocky meteors typically burn up as they pass through our thick atmosphere. Nickel-iron meteors can burn up, but usually have the mass to punch through to some degree.
What is the animal group with the most extinctions?
invertabates are the animals with the most extinctions
Name some birds that survived mass extinctions.?
If they went extinct they wouldn't survive
What are some extinctions other than dinosaurs?
dodos, elephant birds, passenger pigeons
What kind of threats do they pose to earth?
Asteroids and meteors can pose a threat to Earth by potentially colliding with our planet, causing significant damage and destruction. Some impacts have the potential to create tsunamis, wildfires, and even lead to mass extinctions. It is important to continue monitoring these celestial objects and developing strategies to mitigate any potential impact risks.
What was the outcomes of each of the mass extinctions?
The outcomes of each of the mass extinctions is that animal and/or bacteria die.
Do scientists believe that extinctions are uncommon?
No, they are fundamental to the process of evolution. Mass extinctions are less common.
Meteors shape of orbit?
Meteors typically have elliptical orbits, similar to comets. Their shape of orbit can vary depending on their origin and the gravitational forces they encounter in the solar system. Some meteors follow stable orbits, while others may have more inclined or eccentric paths.
When geologists refer to the Big Five what are they referring to?
The Big Five refers to the five major mass extinctions in Earth's history. These events were responsible for a significant loss of biodiversity and reshaped the course of evolution.
The causes of some of the earliest extinctions such as the Permian extinction are because humans started changing the earth?
A+ False
