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Science Project by Jessica Crouser

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Jessica Crouser

on 22 February 2011

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Transcript of Science Project by Jessica Crouser

Convection With convection, heat rises and less dense things sink.
Convection currents cause the Earth to move and they
are brought to an extreme in the mantle. It heats up in the mantle and the molecules make it less dense. Since less dense things rise, they rise to the crust. There, it cools and sinks. Heat -> Energy -> Movement. The crust is "floating" on the mantle.
So, when the mantle moves, so does the crust on top of it. Volcanoes Mt. Popo is known as a symmetrical volcanic cone or cinder cone volcano. You can know
this from the fact that cinder cones are the most common
type of volcanoes and Mt. Popo is used to predict what
other volcanoes will do because it's kind is very common. Their shapes are relatively the same (see pictures above).
It's explosive and emits gas & rock out of its giant crater.
It's located
on a subduction zone meaning the plates are
moving together. Structure of Earth The structure of the Earth is in layers.
The core is in the center because it
is the most dense and dense things
sink. The crust is the least dense and
so it is on top. So, as you go up the
layers, the density goes down. The closer the layer is to the crust, the cooler it gets. Seismographs are how
scientists know things like that the
outer core is liquid. They send seismic waves to travel through the Earth. These waves travel differently through different temperatures and densities. Plate movement
Scientists can figure out where plate boundaries
are by where many earthquakes have occured.
Because earthquakes happen on plate boundaries,
if they record multiple in the same location, the conclude that there must be a plate boundary there. Evidence that we have about the Earth moving is that the continents are moving towards and apart from each other. Scientists think that once all the continents were all connected. A German scientist named the "super continent" Pangea. Now they are all distanced apart because of their moving plates. A specific example is that Mount Everest is getting taller every year. It's only a couple inches but that still proves that the Earth is moving. Also, Californian cities are moving closer to each other just a tiny bit because of the plate movement. Science Presentation
by Jessica Crouser Plate Boundaries Mt. Popo is on a convergent boundary
where the North AMerican and Pacific plates
came together. The geologic activity on this
boundary is mainly volcanoes. Because it's on a
convergent boundary, the plates were moving towards
each other on a subduction zone. Mt. Popo is part
of a belt of volcanoes.
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