radiation

advertisement
Thermal Energy
November 14,
2011
Ms. Smith
Mrs. Malone
DO NOW:
1. Tape in “Vocabulary for Quiz 13” onto the next open
page of your composition book.
2. Read and answer the “Warming Water” handout.
3. Tape in the “Warming Water” handout onto the next
open page of your comp. book.
Thermal Energy
November 14,
2011
Effect of Heat on Atoms
:
Ms. Smith
Mrs. Malone
November 14,
2011
Thermal Energy
Reminders
Tutorials:
Tuesday after school
Vocabulary Quiz on Friday
:
Ms. Smith
Mrs. Malone
Thermal Energy
November 14,
2011
Ms. Smith
Mrs. Malone
1. Log onto your computer
Username: S(Student Id #)
Password: First letter of your
last name Birthdate s
2. www.ohenryscience6.weebly.com
3. Click on the handouts tab
4. Open Week 13 PPT
5. Use the PPT to fill out the vocabulary foldable
:
Thermal Energy
November 14,
2011
Ms. Smith
Mrs. Malone
Heat moves from warmer matter to cooler
matter.
warmer
cooler
Heat moves in 3 different ways:
1. Conduction
2. Convection
:
3. Radiation
Thermal Energy
November 14,
2011
Ms. Smith
Mrs. Malone
Conduction
The transfer of heat through a material by direct
contact.
Examples:
1. A metal spoon gets hot quickly in hot cocoa.
2. An iron heats up the material it comes in contact with.
:
List one more example on your foldable.
Thermal Energy
November 14,
2011
Ms. Smith
Mrs. Malone
Convection
The transfer of heat in a fluid (gas or liquid) as a
result of the movement of the fluid itself.
:
Note that the warm material rises, cools at the surface and
then sinks in a circular pattern.
Thermal Energy
November 14,
2011
Convection
Examples:
1. Pot of boiling water
2. Ocean currents
List one more example of your foldable.
Animations of conduction
and
convection:
:
Teacher's Domain Animations
Ms. Smith
Mrs. Malone
Thermal Energy
November 14,
2011
Ms. Smith
Mrs. Malone
Radiation
The transfer of heat via electromagnetic waves through
space.
Examples:
1. The heat from the sun melting ice cream.
2. The heat from a campfire.
:
List one more example
on your foldable
Thermal Energy
November 14,
2011
Ms. Smith
Mrs. Malone
1. Tape in the vocabulary foldable on the next open
page of your comp. book.
2. Go to the following website:
http://austinisd.stemscopes.com/login
3. Log in information:
Username: science6
Password: science6
:
3. Play either game as a review of what you
just learned.
Name:_________________________________ Period:_________________
Exit Ticket
A.
B.
A:___________________
B:___________________
C:___________________
C.
What is the difference between hot and cold water in terms of K.E.?
___________________________________________________________
___________________________________________________________
November 14,
2011
Thermal Energy
Review
Why do we get sunburn?
Radiation
:
Ms. Smith
Mrs. Malone
November 14,
2011
Thermal Energy
Ms. Smith
Mrs. Malone
Review
How does heat move through a pot of boiling water
and make all the water boil?
Convection
:
November 14,
2011
Thermal Energy
Ms. Smith
Mrs. Malone
Review
The roof of your mouth gets burned with hot pizza?
Conduction
:
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
DO NOW:
On the next open page of your journal explain why a
chocolate bar melts in your hand. Try to use at least one
of your new vocabulary terms in your science journal in
your explanation. Don't forget to use labels if you draw a
diagram.
November 15,
2011
Thermal Energy
Reminders
Tutorials:
Tuesday after school
Vocabulary Quiz on Friday
:
Ms. Smith
Mrs. Malone
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Heat moves from warmer matter to cooler
matter.
warmer
cooler
:
Thermal Energy
Block Day
Ms. Smith
Mrs. Malone
DO NOW:
1.
2.
Pick up the handout and one pair of
goggles.
In your composition book list at least
one example of conduction, convection,
and radiation.
Block Day
Thermal Energy
Review
Why do we get sunburn?
Radiation
:
Ms. Smith
Mrs. Malone
Block Day
Thermal Energy
Ms. Smith
Mrs. Malone
Review
How does heat move through a pot of boiling water
and make all the water boil?
Convection
:
Block Day
Thermal Energy
Ms. Smith
Mrs. Malone
Review
The roof of your mouth gets burned with hot pizza?
Conduction
:
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Breath on a Cold Day: As the organism exhales,
water vapor in the breath comes in contact with
colder air. This causes water vapor to condense into
water droplets which we can see suspended in the
air. The heat from the organism’s breath warms up
the surrounding cooler air. The movement of matter
facilitates the transference of heat, so transfer is
by convection.
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Steaming Hot Coffee: The hot coffee is at a higher
temperature than the surrounding air and mug. Heat is
transferred from the coffee to the mug/cooler air
above the coffee and we see the water droplets
condense by convection.
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Hot Soup with Metal Spoon: The hot soup
is at a higher temperature than the metal
spoon. The metal spoon is hot from energy
transferred through contact by conduction.
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Ice Cream Melting in the Sun: Higher heat
from the sun is transferred to the lower heated ice
cream causing the ice cream to melt. The heat
source is not directly touching the object it is
warming up. (radiation).
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Heat Lamp: The heat from the lamp warms the
air molecules by radiation.
:
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Hot Spring Geyser: Hot springs are geothermal
heated groundwater. Cooler water seeps into the
ground and comes in contact with hot rocks
associated with magma chambers below the Earth’s
surface (conduction). As water is heated to above
boiling point, it remains in liquid form due to
intense pressure, but is much less dense, bringing it
to the surface. (convection)
:
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Boiling Water: The pot becomes hot from touching
the heat source (conduction), the water at the
bottom of the pot gets warm first, and moves upward
since it becomes less dense. This pushes the cooler
water at the top down, creating a convection current.
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Woodstove: Heat is transferred in two ways. Firelight
transfers heat by radiation, the woodstove becomes hot
due to conduction from the fire toughing the metal. The
air inside the stove gets hot, rising and falling in
a convection current. If you place an object on top of the
stove, you have another example of conduction.
:
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Mirage: Heat from the sun warms the black asphalt
(radiation). The air directly above the asphalt becomes
hotter, drastically changing the density levels of air near
the ground. A wavy and often duplicate image appears
because light bends when it passes from one medium to
another (in this case: warmer air to cooler air).
:
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Cooking in the Oven: Heat is transferred in an oven
primarily through convection and by radiation (from
heat being emitted from the hot walls. Convection ovens
are different from conventional ovens in that they
forcefully circulate the air.
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Toasting Marshmallows: The marshmallows
are toasted by radiation.
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Ironing: The metal iron uses conduction to warm
objects it comes in contact with.
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Toaster: The toaster uses radiation from the
coils to toast the bread.
Thermal Energy
November 15,
2011
Ms. Smith
Mrs. Malone
Baking Cookies: The cookie sheet
uses conduction to transfer heat. Inside the
oven, radiation also allows the cookies to cook.
Thermal Energy
November 15,
2011
Microwave Oven: The microwave
uses radiation to cook food.
Ms. Smith
Mrs. Malone
Thermal Energy
November 18,
2011
DO NOW:
1. Complete the “CAQ Concept
Attainment Do Now”
2. Set-up two privacy folders for
today’s quiz.
Ms. Smith
Mrs. Malone
Download