Powerpoint presentation in Science 8

1. Heat vs. Temperature
PREPARED BY:
CECILIA B. SARITA

2. OBJECTIVES:
At the end of the lesson the
students should be able to:
Distinguish between heat and
temperature; and
Explain how heat and
temperature are related.

3. Heat Temperature
Is the quantity of energy
absorbed or
given off by an object
Is the measure of hotness
and coldness of an object
Unit: Calorie Unit: Degree
Instrument measuring
heat:
Calorimeter
Instrument measuring
temperature:
Thermometer

4. HEAT
transfer of (thermal) energy
between objects or places due to
temperature difference
Heat transfers from an object of
higher temperature to an object of
lower temperature.

5. HEAT
form of energy and is measured in
joules
It takes about 4.2 joules of heat to
change 1 gram of water by 1 Celsius
degree

6. Thermal energy
is the energy that is actually
contained in an object due to
the motion of its particles.

7. Temperature
measured in degrees;
describes the average kinetic energy of
molecules within a material or system and is
measured:
a. Celsius (°C),
b. Kelvin (K),
c. Fahrenheit (°F),
d. Rankine (R).

8. Temperature
It is a measurable physical property of
an object—a.k.a. a state vaiable.
measurable physical properties include:
a. velocity,
b. mass, and
c. density.

9. Difference between heat and temperature at
molecular level

10. Relationship of heat and temperature
TEMPERATURE indicates the
direction in which heat flows
while HEAT is the actual energy
being transferred

11. Second Law of
Thermodynamics
states that heat will always
flow spontaneously from
hotter substances to colder
ones.

12. QUIZ

13. Q1.
It measure the hotness
and coldness of an
object

14. Q2.
the quantity of energy
absorbed or given off by
an object

15. Q3.
It takes about ______ of
heat to change 1 gram of
water by 1 Celsius degree

16. Q4.
Instrument used in
measuring heat

17. Q5.
Instrument used in
measuring
temperature

18. Q6.
the energy that is
actually contained in an
object due to the motion
of its particles

19. Q7.
states that heat will
always flow spontaneously
from hotter substances to
colder ones

20. Q8-10
Temperature describes the
average kinetic energy of
molecules within a material or
system and is measured as
the ff:

21. Answer key
1.Temperature
2.Heat
3.4.2 J
4.Calorimeter
5.Thermometer
6.Thermal energy
7.Second Law of thermodynamics
8.Celsius
9.Kelvin
10.Fahrenheit

22. Learning Task No. 1:
Look at the illustration, what concepts of heat are
being shown in this picture?

23. Learning Task No. 2:
Using the same diagram above,
state the Second Law of
Thermodynamics.
Write three sentences on the
differences between heat and
temperature.

24. Learning Task No. 3:
Do the activity . Answer the guide questions.
Write your answers in you’re AS
Material: 2 glasses of water
1. Prepare two glasses of water:
2. Label the glasses A-cold and B- warm.
3. Pour cold water on glass A and warm water in
Glass B.
4. Dip your finger in each of the glass of water.
5. Describe the heat and temperature of water.

25. Figure : Two glasses of water
(http://warriorsofweight.com/images/two_glasses_of_water.jpg
Glass A Glass B

26. GUIDE QUESTIONS:
1.In which glass of water did you feel the water
warm? cold?
2.How did you know it is cold? warm?
3.What do you think is the temperature of the
water?
4.Why is it we could not tell accurately the
temperature of water?
5.What could be the unit used to measure the
temperature?

27. 1.It is the quantity of energy absorbed or
given off by an object.
2. It is the unit of heat.
3.It is defined as the measure of hotness or
coldness of a body.
4.The instrument used to measure
temperature. _______________
5.The unit of temperature. _______________
Learning Task No. 4: