Mystery Science Why Did the Dinosaurs Go Extinct?

The Dinosaurs became extinct

• About 165 million years ago

• About 65 million years ago

• About 250 million years ago

• Nobody is quite sure

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NGSS.MS-LS4-1

Dinosaurs became extinct about 65 million years ago at the end of the ___ ___?

• Jurrassic period

• Triassic Period

• Cretaceous Period

• Monolithic Period

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About __ of all animal life on earth died out. Scientists call it a mass extinction

• 100%

• 30%

• 50%

• 70%

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What does the word cometiton mean?

• Different animal species fighting for the same food source

• Different animal species fighting for the same habitat (space).

• Different animal species fighting for the same water source

• All the animals of the above

One theory for the diosaurs becoming extinct is competition with __

• Smaller, smarter reptiles

• Larger, stronger mammals

• Smaller, smarter mammals

• Larger, stronger reptiles

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A massive asteroid hit the earth at Yucatan Peninsula in __ about __million years.

• Mexico ...165

• Mexico... 65

• China ..... 65

• China .....65

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An asteroid's impact (hitting the earth) maybe caused a giant __ which caused major changes in the climate.

• Typhoon

• Ice Age

• Earthquake

• Dust cloud

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The dust maybe destroyed lots of the plants, so __ starved and the __ were left with nothing to eat either.

• carnivores, herbivorous

• herbivorous, carnivores

• herbivorous, omnivores

• herbivores, people

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Ice Age theory: As dinosaurs were __ __, it would have been hard for them to cope with such __ conditions.

• warm blooded, warm

• cold blooded, warm

• warm blooded, cold

• cold blooded, warm

So what do you think? Have you got a theory? Why do you think that the Dinosaurs became extinct? Give one or two reasons to support your opinion.

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NGSS.MS-LS4-1