Phenomena
Fossils
Volcanoes
Earthquakes
Tectonic Plate movement
Divergent Boundary
Convergent Boundary
Transform boundary
has shear stress, this type of stress happens when two plates are sliding one another
has compressional stress, this stress happens when two plates are pushed together
this has tensional stress, this type of stress happens when two plates are pulling apart from each other
Paleontologists are people who study fossils from earlier geologic times. They excavate the land surrounding the fossil.
In class we did a lab with our partners. We had to excavate plaster that had fossils inside, just like paleontologists do. Were we given tools to be able to excavate.
Fossils have two types cast and mold
Composite volcano
a tall cone shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials (stratovolcano)
Cinder Cone volcanoes
a steep, cone-shaped hill or small mountain made up of volcanic ash, and bombs piled up around a volcano's opening.
Shield Volcano
when fluid lava is extruded, the volcano takes the shape of the non-steep broad, domed structure, built primarily of fluid basaltic lava, can be some of largest volcanoes.
After, we had gotten all four of the fossils we had to identify the fossil and the age period is was found in and we put it in layers called strata.
Earthquakes are caused when tectonic plates are suddenly broken along a fault.
We did a shake table lab with the spring
P-waves move faster than S-waves and are measured by the Richter scale
a cast is when minerals fill into a cavity mold and hardens over time creating a replica of the original organism.
a mold is formed when acids dissolve a bone, tooth, or shell and leave an imprint of the object in the sediment.
We did a lab with the mats to see what plates create what boundary.
Seismometers are used to measure the magnitude of earthquakes.
The is Ring of Fire is where most earthquakes happen because its along a fsut and tectonic plates.