Transcript Where Did Everyone Go!

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.
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.
Extinction Theory #2
Volcanic Eruption
• 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.
Extinction Theory #3
Climate Changes
• 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.
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.
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.