blog for week of dec.1

http://www.pbs.org/wgbh/evolution/extinction/dinosaurs/asteroid.html
dec.6th
i got this off the blog sheet.
no author

This article explains how the it could or couldnt be a theory that an asteroid killed the dinosaurs. It talks about why it could be true and why it couldnt be true.

In class we learned about the 5 spheres. The 5 spheres are biosphere,geosphere,hydrosphere,atomsphere, and exosphere. About 65 million years ago the great comet struck the Yukatan peninsula. Now because of that black dust has clouded the earths atmosphere and now sun rays is blocked out. The dust settled to the trophoshere but the greenhouse gase caused a change in the tempature.

But there are other theorys about dinosaurs.
They say that volcanoes could have had a huge part into the extinction of dinosaurs. When the volcanoe erupts the lava can spread towards where the dinosaurs are and that can hurt the dinosaurs.

I think that this blog was very interesting becasue i got to learn alot about the dinosaurs.