Where Did Everyone Go! You may have noticed that there are no dinosaurs around these days. In fact, there haven't been any around for about 66 million years.

Asteroid hits the earth. Extinction Theory #1 Asteroid hits the earth. An asteroid hits the earth. Dust and debris are scattered into the atmosphere. The impact causes changes in earth’s atmosphere.

Write one or two questions that you have about the Asteroid Theory.

Volcanic Eruption Extinction Theory #2 Giant volcano erupts. The ash goes into the atmosphere. Carbon Dioxide builds up in atmosphere. Earth heats up, causing greenhouse effect.

Write one or two questions that you have about the Volcanic Eruption Theory.

Climate Changes Extinction Theory #3 Earth’s Orbit changed. Became further away from the sun. Caused the Ice Age.

Write one or two questions that you have about the Climate Change Theory.

Supernova (star) Explodes Extinction Theory #4 Supernova (star) Explodes A star explodes near earth. Radiation contaminates the atmosphere. Radiation kills all living things.

Write one or two questions that you have about the Super Nova Theory.

Disease attacks dinosaurs Extinction Theory #5 Disease attacks dinosaurs Over time dinosaurs contracted diseases. Diseases were spread throughout dinosaur species. They were unable to fight off the diseases.

Write one or two questions that you have about the Disease Theory.

What do you think happened to the dinosaurs? Asteroid Volcanic Eruption Climate Change Super Nova Diseases Or Something Else

Write one or two questions that you have about a different theory.