Fast and Slow Change

From earthquakes that last seconds to continental drift that takes millions of years, the Earth changes in many ways.


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yellowstone2007 wrote on Wed, 05/07/2014 - 17:05:

How can you state it as fact that it was 'millions' of years for some of these changes to take place?

rkrampf wrote on Sat, 05/10/2014 - 05:02:

There is a tremendous amount of scientific evidence, especially in the science of tectonics. We can measure the speed and direction that the crustal plates are moving today, and see the evidence of their past movements.

scotmariah@yahoo.com wrote on Mon, 02/24/2014 - 11:00:

How did Pangea get separated?

rkrampf wrote on Tue, 02/25/2014 - 21:08:

The crust of the Earth is broken into large plates. These plates are still moving today. For example, the United States is moving west at about the same rate that your fingernails grow. As these plates move, they sometimes bring continents together, and sometimes move them apart.

ljjarvis13 wrote on Mon, 10/21/2013 - 17:49:

This is such a great short video to reenforce what my son is learning about volcanoes, plate tectonics and earthquakes. We love these videos.

Anonymous wrote on Tue, 02/19/2013 - 21:06:

Is flood is slow or fast?

volusia wrote on Mon, 10/15/2012 - 13:18:

IT WAS PRETTY SHORT. BUT SUPISLINGLY IT WAS REALLY GOOD

J_Eli wrote on Tue, 05/22/2012 - 10:32:

i alredy knew prety much all of that but its still intreresting

Anonymous wrote on Thu, 04/07/2011 - 13:51:

that was sooo cool thanks

florida teacher (not verified) wrote on Thu, 03/10/2011 - 16:19:

Thank you for showing me and other students how changes work.

Anonymous wrote on Thu, 09/15/2011 - 18:20:

hi i dont know you but you are awsome and a good scientist thank you and have a great day

florida teacher (not verified) wrote on Thu, 03/10/2011 - 16:18:

It was cool. The earth was a big piece of land and it's now just alot of pieces of land. My teacher taught us about the San Andreas fault.

florida teacher (not verified) wrote on Thu, 03/10/2011 - 16:16:

It was entertaining.

florida teacher (not verified) wrote on Thu, 03/10/2011 - 16:16:

I liked this video because it was very interesting.

florida teacher (not verified) wrote on Thu, 03/10/2011 - 16:15:

I liked the video because I usually don't pay attention, but it caught my attention.