Mikki Johnston Feb.15,2008 3/3

What we did today!

• Looked at Carbon Reservoirs Questions from Yesterday


• Talked about Global Warming


• Talked about Greenhouse Effect


• Watched a clip of a video about something (Global Warming and Core samples and stuff)

Thoughts about the class

Well as we were watching the video about the Greenhouse effect or what not I wondered about how can core samples can tell you about the Earth ?!?

Additional Info

Ok so the core samples are layers of snow compacted over time and each layer tells you something about the Earth. It's like telling the history of the planet through snowly layers! Core samples also can be taken from trees rings and from the ocean floor. The core samples can tell you if there had been an ice age, drought and all sorts of stuff.

"A core sample is a cylindrical section of a naturally occurring medium consistent enough to hold a layered structure." -http://en.wikipedia.org/wiki/Core_sample

Sources:
http://en.wikipedia.org/wiki/Core_sample

http://www.mnr.gov.on.ca/MNR/ogsr/images/core_library.jpeg