Weekly Blog 10/5 - 10/12

Summary: 
During this week, we learned about different types of volcanoes. A shield volcano is built almost entirely of fluid magma flows. They are large in size and resemble a shield lying on the ground. When they erupt, ash and rocks don't spew into the air.

Cinder cones, are the smallest type of volcanoes, with heights generally less than 300 meters. They can occur as discrete volcanoes on basaltic lava fields, or as parasitic cones generated by flank eruptions on shield volcanoes. 

A stratovolcano, (composite volcano) is a conical volcano built up by many layers (strata) of hardened lava, tephra, pumice, and volcanic ash. The lava that flows from them is highly viscous, and cools and hardens before spreading very far. (Viscous: having a thick, sticky consistency between solid and liquid; having a high viscosity. Viscosity: the thickness of solids, liquids, and semifluids.)

SP2:
During this week our class talked about shield volcanoes and stratovolcanoes. We did an experiment about stratovolcanoes. The experiment had a centrifuge tube with some baking soda, and then we got a cup of white vinegar. We poured in a third of the vinegar inside the centrifuge tube and we put a small green cork-like thing on top of the centrifuge tube. We did this about three times and every time the cork popped out of the centrifuge tube. Also, the third time the we performed the experiment, the corked popped really high, and foam bubbled out of the top. 

Citation: The Types of Volcanoes

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