Mass Extinctions

Flashcard
•
Science
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a mass extinction?
Back
A mass extinction is a widespread and rapid decrease in the biodiversity on Earth, characterized by the extinction of a large number of species in a relatively short period of geological time.
2.
FLASHCARD QUESTION
Front
What are the five major mass extinction events in Earth's history?
Back
1. Ordovician-Silurian Extinction 2. Late Devonian Extinction 3. Permian-Triassic Extinction 4. Triassic-Jurassic Extinction 5. Cretaceous-Paleogene Extinction
3.
FLASHCARD QUESTION
Front
What is the Cretaceous-Paleogene Extinction known for?
Back
The Cretaceous-Paleogene Extinction is known for the mass extinction of the dinosaurs and many other species, primarily caused by a massive asteroid impact.
4.
FLASHCARD QUESTION
Front
What geological evidence supports the asteroid impact theory for the Cretaceous-Paleogene Extinction?
Back
The presence of a layer of iridium-rich clay found in the geologic record, known as the K-T boundary, supports the asteroid impact theory.
5.
FLASHCARD QUESTION
Front
What role do volcanic eruptions play in mass extinctions?
Back
Volcanic eruptions can lead to mass extinctions by releasing large amounts of ash and gases into the atmosphere, causing climate change and habitat destruction.
6.
FLASHCARD QUESTION
Front
What is the Permian-Triassic Extinction known for?
Back
The Permian-Triassic Extinction, also known as the Great Dying, is known for being the most severe extinction event, with about 90% of species going extinct.
7.
FLASHCARD QUESTION
Front
How do mass extinctions impact evolutionary processes?
Back
Mass extinctions can create opportunities for the evolution of new species by removing dominant species and allowing for adaptive radiation.
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