Earth's Interior, Convection, and Convection in the Mantle
Terms in this set (31)
what is one reason it is difficult to get to the earth's interior?
it is distant, hard to get to, and the heat and pressure would kill you.
what are the three sections that the earth's interior is divided into?
the crust, mantle and core.
in which part of the earth's interior are convection currents located?
why is the earth's core so hot?
1)some atoms in the core are radioactive.
2)when rocks were colliding, friction was generated.
how do convection currents affect people living on the earth's surface?
they move the tectonic plates causing earthquakes.
where else in everyday life can convection currents be seen/experienced?
a bowl of soup. the soup is heated by the heat source(flame) and becomes less dense. once at the top, it cools down and becomes more dense and floats down again. the cycle repeats over and over.
why does heated material (solid, liquid, or gas) rise?
it is less dense than the material around it.
what is the name of the force that pulls dense rock toward the core?
in the model of heated water, describe where the dye rose.
up and away from the heat source.
in the model with dye and heated water, describe where the die sank.
to the sides because it was moving away from the heat source.
in our model, what object represented the heat source?
the cup of hot water.
in our model, how might we have represented tectonic plates?
paper, cardboard, anything that floats
when heat is transferred through fluids ( water, air...)
conduction is when heat is transferred between two objects that are touching.
when energy travels through open space
what is the difference between the lithosphere and the asthenosphere?
the lithospheres the upper layer on the mantle and the asthenosphere is the lower layer on the mantle. the lithosphere is rigid and the asthenosphere is like softened tar, its somewhat soft and can bend like plastic.
what is the main type of rock in the oceanic crust?
what causes seismic waves?
how do geologists find data about the earth's interior?
they use seismic waves. they study the speed and path they take to see the structure of the planet.
what does gravity do in the process of convection?
after the soup is heated and floats to the top, it cools and gravity pulls it down again.
what are the two ways scientists learn about the earth's interior?
direct samples and indirect samples.
what is the directs way to learn about the earths interior?
what is the indirect way to learn about the earths interior?
is the asthenosphere solid or liquid
what two metals is the core mostly made of?
iron and nickel
is the outer core liquid or solid?
is the inner core liquid or solid?
what anther substances might be in the core?
oxygen, sulfur and silicon
what do scientists think create the earth's magnetic field?
the movements in the outer core
what are the three different types of heat transfer?
radiation, conduction & convection.
a measure of how much mass there is in an object.
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