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When a mass extinction happens a large amount of plants or animals die off.

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The largest mass extinction was about 251 years ago. Long ago there were lots of great animals but a big metero kill off lots of dinosores and that is mass extinction.

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A mass extinction is when mostly all animals died because of a catastrophe.

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A mass extinction is when most animals die by a natural catastrophe. For example the dinosaurs die from a natural catastrophe.

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We know that mass extintion is when a large group of animals die out due to a natural catastrophe.

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Mass extinction is when more than one species dies out by a catastrophe. Effects include species dying out moment by moment and animals can evolve to fit into their new environment.

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A mass extinctions is naturally events. The dinosaurs were in the biggest mass extinctions.

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The mass extinction killed the dinosaurs ,thats why they're extinct.

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A mass extinction is when more than half the population of plants,mamals,and animals die of a natrual phenomoun

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What we know about mass extinction is that species die off rapidly due to unatural causes.

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A mass extinction is an extinction in which a large amount of animals got extinct in a short period of time.

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In a mass extinction all animals die off because of the huge harm it does to them and their surroundings.

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so true

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A mass extinction is when more than one specie dies by a catastrophe .

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A mass extinction is when most animals, mammals, and plants die off.

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it so true what you type..........

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i like the way that you are briefly explaining everything. From Brandon and Rigoberto

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@Brenda and Kevin

We thought about the same thing! Great minds think alike. (=^w^=)/

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We like the way that you explained the amount of how many animals got extinct.

BY: Natalie Renteria & Christopher Vargas

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@Brandon and Rigoberto

I agree because mass extinction is when a large amount of animals die out.

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Me and Cinthia liked the way you guys had explained about what you know about the mass extinction .

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@juan m. and adrian that is true but we are ruining our own planet and we are going to destroy our own planet

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That is what we thought too.

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Thank you very much .

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Yea thats what we think to.

Benjamin Ochoa and Mario Diaz Nunez

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That is true about all animals die.

by Ashley Pacheco

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i like urs

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We agree about what you said .