Dinosaur Extinction

The Dinosaurs became extinct

• About 165 million years ago

• About 65 million years ago

• About 250 million years ago

• Nobody is quite sure

Tags

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

Tags

NGSS.MS-LS4-1

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

• 100%

• 30%

• 50%

• 70%

Tags

NGSS.MS-LS4-1

One theory for the diosaurs becoming extinct is competition with __

• Smaller, smarter reptiles

• Larger, stronger mammals

• Smaller, smarter mammals

• Larger, stronger reptiles

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What have some scientists inferred from fossils about how dinosaurs suddenly went extinct?

• a huge rock from space crashed into Earth

• a large volcano erupted

• the dinosaurs became poorly adapted to their environment

• all of the above

Tags

NGSS.MS-LS4-1

The Cretaceous Period ended with a massive event. What was it?

• A global flood

• An ice age

• A mass extinction

• The Cambrian explosion

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

NGSS.MS-LS4-1

What is believed to be a major factor in the extinction of dinosaurs?

• A giant volcano eruption

• An ice age

• A massive flood

• An asteroid impact

Tags

NGSS.MS-LS4-1

What caused the mass extinction at the end of the Cretaceous Period?

• A massive flood

• An asteroid impact

• A global ice age

• Volcanic eruptions

Tags

NGSS.MS-LS4-1

Why do scientists think that NOT ALL dinosaurs died in the Cretaceous extinction?

• They have photographic evidence

• Because birds are still living today

• A zoo in California has a living dinosaur

• Birds are descendants of dinosaurs

• Only non-birds went extinct.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

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

• Mexico ...165

• Mexico... 65

• China ..... 65

• China .....65

Tags

NGSS.MS-ESS1-4