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Transcript
Do Now
Give an example for each of the following
energy conversions.
1.
2.
3.
4.
Electrical → Thermal
Chemical → Mechanical
Electrical → Mechanical
Mechanical → Sound
Write your answers in your science journal.
Do now
 The
temperature of boiling water is 100° on the
Celsius scale and 212° on the Fahrenheit scale.
Look at each of the following temperatures and
decide whether you think that it is hot or cold:
 60°F,
60°C, 37°F, 37°C, 0°C,100°F, 70°F
 Write
your responses in your science journal.
•Objectives:
Describe how temperature relates to kinetic energy.
Compare temperatures on different temperature scales.
Give examples of thermal expansion.
Learning Target
 Today I will: learn about
temperature and how it
related to kinetic energy.
 So that I can: explain and
describe how temperature is
determined.
 I will know I got it if: I can
clearly explain how
temperature is determined
and its relation to kinetic
energy.
Vocabulary

Temperature

Thermal expansion
Agenda

Today we will:
 Learn how heat is
transferred by taking
notes.
 Complete a group
and individual
activity exploring
heat transfer.
 Exit ticket
Anticipatory Set

https://www.youtube.com/watch?v=yXT012us9ng
What Is Temperature?
• Temperature is a measure of the average kinetic energy of
the particles in an object.
• Kinetic energy is the energy of motion. All moving objects
have kinetic energy.
• The amount of kinetic energy that an object has depends on
the object’s mass and speed.
What Is Temperature?, continued
• Temperature and Kinetic Energy All matter is made of
atoms or molecules that are always moving.
• The faster the particles are moving, the more kinetic energy
they have. The more kinetic energy the particles of an object
have, the higher the temperature of the object is.
What Is Temperature?, continued
• The gas particles on the right have a higher average kinetic
energy than those on the left. So, the gas on the right is at a
higher temperature.
What Is Temperature?, continued
• Average Kinetic Energy of Particles The motion of
particles in matter is random, so individual particles have
different amounts of kinetic energy.
• When you measure an object’s temperature, you are
measuring the average kinetic energy of the particles in the
object.
Measuring Temperature
• Using a Thermometer Thermometers can measure
temperature because of a property called thermal expansion.
• Thermal expansion is the increase in volume of a
substance in response to an increase in temperature. As a
substance’s temperature increases, its particles move faster
and spread out.
Measuring Temperature, continued
• Temperature Scales Three common temperature scales
are the Celsius scale, the Fahrenheit scale, and the Kelvin
scale.
• The Kelvin scale is the official SI temperature scale.
9

F    C  32
5

5
C 
 F  32
9
Transferred Thermal Energy
• Heat is the energy transferred between objects that are at
different temperatures.
• When two objects at different temperatures come into
contact, energy is always transferred from the object that has
the higher temperature to the object that has the lower
temperature.
Transferred Thermal Energy, continued
• Heat and Thermal Energy Heat is transferred in the form
of thermal energy. Thermal energy is the total kinetic energy
of the particles that make up a substance.
• Thermal energy depends partly on temperature. Thermal
energy also depends on how much of a substance there is.
Transferred Thermal Energy, continued
• Reaching Thermal Equilibrium The point at which two
object that are touching reach the same temperature is called
thermal equilibrium.
• When objects that are touching have the same temperature,
they are at thermal equilibrium and no net change in the
thermal energy of either one occurs.
Exit Ticket