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Transcript
```Inside Earth
1-2 Convection Currents in the Mantle (pp. 25-27)
∆Introduction (p 25)
Why does a snowflake melt in your hand? Cite details from you
________________________________________________________
________________________________________________________
________________________________________________________
What is heat transfer and what are the three types of heat transfer?
________________________________________________________
____________________________________________
1. ___________________
2. ___________________
3. ___________________
1. Radiation Transfer of energy through
e________ s_________.
ex: S_________ warms Earth’s surface,
or the h______ you feel around a campfire.
∆Conduction (p 26)
2. Conduction heat transfer by
d____________ c___________
ex. Spoon in a pot of hot s_________
ex. Your h_________ touching the hot spoon
ex. Your tongue touching the hot soup
∆Convection (pp 26-27)
3. Convection - Heat transfer by the movement of a heated
f___________
Cooler, denser,
Lava lamp
heavier lava sinks
back down
Lava heats up and
rises because it is
less dense
Convection is caused by the d_____________ of temperature and
density within a fluid.
Compare the density of a very hot blob of “lava” in the lava lamp
and a cold blob of the same “lava” in the lava lamp.
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
Use arrows to show the convection currents that would flow if the
pot of hot chocolate in the drawing was heated.
If the pot is no longer heated, when will the convection currents
stop flowing? ___________________________________________
_____________________________________________________
∆Convection in Earth’s Mantle(p 27)
In which layer of Earth do convection currents flow?
_______________________.
How does the mantle get so hot that it melts the rocks that make up
Earth (magma)?
________________________________________________________
________________________________________________________
________________________________________________________
```
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