“HEAT”
• Heat is a form of
energy that flows from
warmer bodies to
colder bodies.
• It is viewed as a form of
energy that is transferred
from one body to another
due to a difference in
temperature.
• The SI unit of heat is joule
(J).
• Common unit of heat is
calorie.
• CALORIE the amount of
heat needed to change the
temperature of one gram
of water from the pressure
of the atmosphere.
TEMPERATURE
LAYMAN’S TERM
- It is the degree of hotness
or coldness of an object.
Molecular level
- A measure of the average
kinetic energy of these
molecules.
Based from our sensory experiences:
“Can we use our senses
to determine
temperature?”
THERMOMETER
- a device that
measures
temperature
TYPES OF THERMOMETER
The most common type of
the thermometer.
THERMOCOUPLE
-two different metals
(usually copper and iron)
that are twisted together
INFRARED THERMOGRAMS
-a device (camera) that
measures the amount of
radiant energy given off by
an object
TEMPERATURE
SCALES
TEMPERATURE
SCALES
CELSIUS
(Andres
Celsius)
FAHRENHEIT
(Daniel
Gabriel
Fahrenheit)
KELVIN
(William
Thompson /
Lord Kelvin)
RANKINE
(William
Rankine)
°C = 5/9 ( °F –
32)
°F = 9/5 ( °C +
32)
K = °C + 273 °R = °F +
459.67°

Heat (grade 8)