1. VL = 1
Bellwork
1. Make a brief summary:
a. How are
earthquakes
formed/made?
b. What make
volcanoes erupt?

2. Convection
Objective: how
convection activity
relates to plate
movements and
volcanoes.

3. Convection
Vocabulary
 Viscous – (viscosity) resistance of fluids to flow.
Viscosity of fluids depends on the “thin-nes” or
“thickness” of a fluid.
 Example:
 Water is thin – its resistance to flow is low.
 Honey is thicker – its resistance to flow is
high.

4. Convection
Vocabulary
 Rheids – are solid materials, like rocks, that
deforms by viscous flow.
 Example:
 The earth’s mantle is made up of solid
materials that are in semi-liquid form due to
extreme heat, it behaves as a rheid.

5. Convection
Vocabulary
 Convection - refers to the movement of
molecules within fluids (i.e. liquids, gases and
rheids).
 It is one of the major modes of heat transfer
and mass transfer.

6. Convection
 Hotter molecules rise.
 Cooler molecules go down.
 Given the above
facts, predict what is its
effect in a pot of cold
water on a hot plate.
 Ans:
 Heat is evenly distributed.
 Matter is evenly distributed

7. Convection
 Hotter molecules rise.
 Cooler molecules go down.
 In a pot of boiling spaghetti
sauce are chopped Italian
sausages.
 Predict its movement in the
sauce.
 Will the temperature of the
ingredients be the same?
 Will the sausages remain at
the bottom?

8.  Hotter
Convection
molecules
rise up.
 Cooler
molecules
go down.
 Land heats up
easily and
cools down
easily.
 The sea heats
 Explain the convection activity in up slowly and
the picture cools down
slowly.

9.  Hotter
Convection
molecules
rise up.
 Cooler
molecules
go down.
 Land heats up
easily and
cools down
easily.
 The sea heats
 Explain how this convection up slowly and
activity relates to plate cools down
movements and volcanoes. slowly.

10.  Hotter
Convection
molecules
rise up.
 Cooler
molecules
go down.
 Land heats up
easily and
cools down
easily.
 The sea heats
up slowly and
 Draw and label 1. cools down
slowly.

11.  Hotter
Convection
molecules
rise up.
 Cooler
molecules
go down.
 Draw and Label 2
 Explain how this convection
activity relates to plate
movements and volcanoes.