TEMPERATURE: a measure of how rapidly or how
slowly molecules move around
A. Kinetic Energy- Energy of Motion
B. Logically then, the hotter an object the
GREATER the kinetic energy it has or the
FASTER the molecules are moving in the
object.
C. Temperature is a measure of the MOTION of the
molecules.
What is Temperature?
D. Temperature is a measure of the kinetic energy of the molecules.
1. The cooler an object, the
SLOWER the molecules
2. The hotter an object the FASTER
the molecules
3. Absolute zero must be the
temperature at which all molecular
motion STOPS
A. Heat is a QUANTITY of
energy related to the kinetic motion of the molecules.
At what temperature does
water boil?
1. Therefore, what is the temp of a cup
of boiling water?
2. What is the temp of a gallon of boiling water?
3. Which contains more heat a cup or a gallon of boiling
water?
A gallon because it contains a lot more
molecules.
B. Heat always flows from a HOT object or region to a COLD object or
region.
1. The object that is hot is call the
SOURCE
2. The object that is cold is called the
SINK.
3. Therefore, heat energy always flows from a
SOURCE to a SINK.
4. While sitting in a room now are you a source or a sink?
SOURCEbecause you are hotter than the
room
5. When you touch a light bulb that has
been on for a while the heat will flow from the LIGHT BULB to
YOUR HAND
6. How can a hunk of Ice be
considered a heat source.
Everything has heat! If the ice were in a
location where the temperature was colder than the ice, then the ice would give off heat
to the environment.
C. What is your body temperature?
98.6 oF37 oC
C. What is your body temperature?
1. What does it mean if YOU think something is Hot?
1.What does it mean if YOU think
something is Hot?The object’s
temperature is much greater that yours.
2. What does it mean if YOU think
something is Warm?
2. What does it mean if YOU think
something is Warm?The object
temperature is a little greater than yours.
3. What does it mean if YOU think something is Cool?
3. What does it mean if YOU think
something is Cool?The object’s
temperature is slightly less than yours.
4. What does it mean if YOU think something is Cold?
4. What does it mean if YOU think
something is Cold?The object’s
temperature is much less than yours.
2. Each of these terms are called relative terms.
Relative means in order for them to
have meaning they must be comparing two or more things.
What do you think it means when a
scientist says there is no such thing as
COLD?
EVERYTHING GIVES OFF HEAT!