MONDAY, NOVEMBER

WARM-UP
How do unpopped popcorn kernels change to
popped kernels?
Popcorn needs heat to pop--between 400 to 450
degrees Fahrenheit. Inside the kernel is starch
and moisture. When heated, the moisture turns
to steam, which builds pressure inside the
kernel. The pressure increases until the kernel
ruptures, turning the kernel inside out. Yum!
MYP Unit Question: How does land change?
Area of Interaction: Environment
Learner Profile: Thinker
Standard: Investigate the scientific process of
how the Earth's surface is made.
Learning Target: Today I’m learning about
heat transfer because it will help m e to
understand how things on earth heat up.
TYPES OF HEAT TRANSFER
HEAT TRANSFER
Earth’s molten outer core
is nearly as hot as the
surface of the sun.
 Heat is transferred from
the core to the surface of
the Earth through liquids
and solids.

Trivia – Do NOT
copy this
information.
HEAT TRANSFER
What is heat
transfer?
Heat
Transfer – is
the movement of
energy from a
warmer object to a
cooler object.
HEAT TRANSFER
What are
the types of
heat
transfer?
There
are three
types of heat
transfer:
Convection
Radiation
Conduction
RADIATION

Example:
 Sunlight
is radiation that warms the Earth’s
surface
 Heat you feel from around an open flame or fire
Radiation
RADIATION
What is
radiation?
 Radiation:
is the
transfer of energy
through empty space.
CONDUCTION
What is
conduction?
 Conduction:
is heat
transfer by direct
contact of particles of
matter.
CONDUCTION

Example:
Heat
is transferred from the hot soup
and the pot to the particles that make
up the spoon.
Heat
transferred to
the particles
of the spoon
from the pot
and hot water
CONVECTION
What is
convection?
Convection:
is heat
transfer by the
movement of a
heated fluid.
CONVECTION CURRENT
What is a
convection
current?
Convection Current
 cooler fluid continually
sinks to the bottom
 warmer fluid continually
rises to the top.
CONVECTION
CONVECTION
What
causes
convection?
What is
density?
 differences
of
temperature and density
within a fluid.
 Density
- Is a measure of
how much mass there is
in a volume of a
substance.
CLOSING:
Convection Current Demo
 Simon Says “Convection Currents”

HOMEWORK: Finish the Heat Transfer Worksheet
CONVECTION CURRENT
What sets
convection
currents in
motion?
 The
heating and cooling
of the fluid, changes in
the fluid’s density and
the force of gravity
combine to set
convection currents in
motion.
CONVECTION AND THE EARTH’S MANTLE
 Earth’s
Where does
the heat
source for
the Earth’s
currents
come from?
mantle responds
to heat.
 Convection currents flow
in the Asthenosphere.
 The heat source for these
currents come from the
Earth’s core and from the
mantle itself.
CONVECTION AND THE EARTH’S MANTLE
CONVECTION AND THE EARTH’S MANTLE
Stuff to do:
1.
2.
3.

Complete the Heat Transfer concept map on the
back of your note page.
If you didn’t begin or finish the Earth’s interior
worksheet from yesterday pick it up from the red box
and complete it.
Once you have finished Earth’s interior, pick up a
What’s happening during convection? Worksheet.
DO NOT WRITE ON THESE WORKSHEETS!!!! ALL
YOUR WORK MUST BE DONE IN YOUR SCIENCE
NOTEBOOK!
8th Grade Exit Slip 09/14/10

Answer the following question:

What are the three types of heat transfer?