Download Heat - Ms. Bergman`s Classes at DCIS Montbello

What is Heat
6-1
Do Now
1. What was the best part of your spring break?
2. What is one thing you want to accomplish in
class this week?
3. What do you think heat is? Describe one way
that heat can be transferred from one
substance to another?
Objective
• I can explain the differences between 3 types
of heat transfer - convection, conduction, and
radiation – in writing using an exit ticket.
Agenda
1.
2.
3.
4.
5.
Do Now, objective
BrainPop Video
Types of Heat Transfer Investigation
Convection Demo
Exit Ticket
Homework
• None
What is Heat BrainPop
• What is Heat? Video
• As you watch, write down your own
definitions for the following words:
– Heat
– Temperature
What do you think?
• Answer each question using your plicker
1. How do molecules at warm temperatures differ
from molecules at cool temperatures?
a) At warm temperatures, molecules move around
more
b) At warm temperatures, molecules grow in size
c) At warm temperatures, molecules exchange
electrons more easily
d) At warm temperatures, molecules combine with
each other more easily
What do you think?
1. What is the difference between heat and
temperature?
a) Temperature measures the motion of molecules, and
heat is the energy of that motion
b) Temperature is measured by a thermometer, and
heat is measured by a barometer
c) Heat is measured in calories, and temperature is
measured in joules
d) Heat is caused by the sun, and temperature is caused
by conditions in the atmosphere
What do you think?
1. If you turn on a radiator, heat will diffuse
throughout the room. What does this mean?
a.
b.
c.
d.
The temperature will become unbearably hot
The heated molecules will cool down
The heat will be concentrated in one area of the room
The heat will spread out
Types of Heat Transfer Lab
• Today you will be conducting a mini-lab in
which you explore two types of heat transfer
– Conduction
– radiation
Types of Heat Transfer Lab
• In this investigation you are expected to
– Answer all questions on your lab sheet
– Complete both parts of the investigation
– Contribute to your groups understanding of heat
transfer
Convection Demonstration
• Watch as convection is shown in water.
1. What happens when the hot water is placed
in the cold water?
2. What happens to the food coloring when ice
is added?
3. How is heat being transferred throughout the
water?
Types of Heat Transfer: Conduction
• Conduction: the transfer of heat energy from
particle to particle between substances
through contact or within a substance.
– Examples: touching a hot frying pan
Types of Heat Transfer: Radiation
• Radiation (of heat): transfer of heat energy by
emission of electromagnetic radiation in all
directions.
– Examples: heat energy radiates from the sun to
earth
Types of Heat Transfer: Convection
• Convection: the transfer of heat through the
movement of air or liquid currents.
– Examples: convection currents in hot water on a
stove
Exit Ticket
• Silently complete your exit ticket. When you
are finished, turn it into Ms. Bergman.
Day 2
Do Now
• What are the three types of heat transfer that
you learned about in the last class? Draw a
picture to show how each type of heat
transfer works.
Objective
• I can explain the differences between 3 types
of heat transfer - convection, conduction, and
radiation – in writing using an exit ticket.
Agenda
1.
2.
3.
4.
5.
6.
Do Now, objective – 10 min
Heat Guided Reading – 20 min
Plicker Questions – 10 min
Vocabulary – 10 min
Weekly Quiz – 10 min
Switch Energy Documentary – 30 min
What is Heat: Guided Reading
• As you read about heat, answer the guided
questions on a separate sheet of paper using
complete sentences.
Plicker Questions
1. The transfer of heat energy by the motion of
a heated liquid or a gas is?
a)
b)
c)
d)
Convection
Conduction
Radiation
heat
Plicker Questions
1. The transfer of heat energy between particles
in a solid is____________
a)
b)
c)
d)
Convection
Conduction
Radiation
heat
Plicker Questions
1. The transfer of heat energy from a substance
through empty space is ________________
a)
b)
c)
d)
Convection
Conduction
Radiation
heat
Plicker Questions
1. How are the particles of objects affected
when their heat energy is increased?
a) The particles grow in size
b) The particles vibrate more quickly
c) The particles move farther apart from one
another
d) The particles shrink
Plicker Questions
1. The temperature of a sample of pudding is a
measure of the _________ of the particles
that make up the pudding
a)
b)
c)
d)
Activation energy
Potential energy
Kinetic energy
Ionization energy
Plicker Questions
1. As ice cools from 273 K to 263 K, the kinetic
energy of its molecules will
a) decrease
b) increase
c) Remain the same
Vocabulary
• Heat: is a form of energy that results from the
motion of atoms and molecules.
– Measured in Joules (J) 1000 J = 1 kJ
– Heat energy always evens out (heat transfers from warm
objects to cool objects).
• Temperature: a measure of the average kinetic
energy molecules have, or how fast they are moving.
• Thermal Conductivity: the ability of an object to
move heat energy from one part of itself to another.
Vocabulary
• Calorie: the amount of heat energy required
to raise the temperature of 1 g of water 1ºC.
Plicker Question
• Solid X is placed in contact with solid Y. Heat
energy will flow spontaneously from X to Y
when
– X is 20ºC and Y is 20ºC
– X is 10ºC and Y is 5ºC
– X is -25ºC and Y is -10ºC
– X is 25ºC and Y is 30ºC
Weekly Quiz
• Answer the questions on your weekly quiz
silently. When you are finished, turn it in.
Switch Documentary
• This unit is all about heat and energy.
• The energy industry is one of the largest in the
world. This documentary looks at how the
energy industry works, and how the world can
move towards using renewable energy that
doesn’t rely on burning fossil fuels which put
CO2 into the atmosphere contributing to
global warming.