Up to this point, we have focused on what earthquakes are, how we detect them and how they are measured. Now we are going to start trying to answer that nagging question that everyone keeps asking - Why do they happen?
To answer this question we need to understand where they occur. Lat week, we discovered that there are patterns in their locations, but not always. We also highlighted the 3 major belts for seismic activity: Ring of Fire, Mid- Atlantic Ridge, and the Mediterranean-Himalyan Belt.
We also discussed that the crust is divided into plates. Our focus today and tomorrow will be how this info came about. In class we plotted fossil evidence to support the giant landmass idea and came up with theories to challenge the idea. It sounds silly that anyone would challenge the idea but this was a BIG deal in the science community.
Homework: Finish the fossil questions on ISN pg 37
No comments:
Post a Comment