
Tommy's Blog
Tuesday, May 22, 2012
Tuesday, May 8, 2012
Moving Rocks
Photograph of Hell's Gate, British Columbia (Photo credit: Wikipedia) |
Wednesday, May 2, 2012
Rocks
Jet is made from rotten trees that have been squished together. It looks like black glass.

http://www.mindat.org/min-9355.html
Cabo Mondego Mine, Figueira da Foz, Coimbra District, Portugal
© Martins da Pedra
© Martins da Pedra
http://www.mindat.org/min-9355.html
Thursday, April 5, 2012
Tuesday, April 3, 2012
Rocks
When the lava is in the ground it is called magma. But when it explodes out of the volcano it is called lava. If you find a colored rock that is sticking up with a little bit of black on it and if you break it open they will have crystal in it.
Thursday, March 22, 2012
Blowing up rocks
You make an explosion on the top of the ground. Shockwaves goes down into the ground and it bounces off one of the rocks in the ground and bounces back up to the top. Then they can tell what the rocks look like underneath. This is a seismograph.
Thursday, March 1, 2012
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