Station 2: Refraction of Sound Waves Questions:
A. Content Standards The learner demonstrates understanding of heat and temperature and the effects of heat on the body
2. Learner's Materials Pages 49-51
Teaching Date and
Time Quarter First (Physics)
DAY:
I. OBJECTIVES
A. Content Standards The learner demonstrates understanding of heat and temperature and the effects of heat on the body.
B. Performance Standards C.
Learning Competencies / Objectives Write the LC code for each
(S8FE-Ig-29)
Differentiate between heat and temperature at the molecular level
Objective:
Compare the heat capacities of the given liquid samples.
II. CONTENT Module V: HEAT
Lesson 28: HEAT CAPACITY
III. LEARNING RESOURCES
A. References
1. Teacher's Guide Pages 34
2. Learner's Materials Pages 49-51
3. Textbook Pages
4. Additional Materials from Learning
Resource (LR) portal
B. Other Learning Resource
IV. PROCEDURES
A. Reviewing previous lesson or presenting the new lesson
Explain the effect of temperature change on phase changes.
B. Establishing a purpose for the Lesson
Even if the objects are at the same location they have different temperatures.
C. Presenting examples / instances of the new lesson
Have you ever been outside in the playground during one sunny day and suddenly touch the metal of a swing set? How does it feel? Is it hot? Yes!
How about walking barefoot on a sunny day? Have you ever walked on the sidewalk and had to jump to the grass because the pavement was too hot for your feet? Do you think the grass and the pavement are actually different temperatures?
D. Discussing new concepts and practicing new skills #1
Activity see Lesson Guide pp. 112-113
E. Discussing new concepts and practicing new skills #2
1. Which liquid requires more time to increase in temperature by 5 degrees? Explain.
2. Which liquid requires more heat to increase in temperature by 5 degrees? Explain.
3. Which liquid has a greater heat capacity? Why?
F. Developing mastery
(Leads to Formative Assessment 3)
Discuss the answers in the activity given
G Finding practical applications of concepts and skills in daily living
Substances that have a high specific heat capacity are suitable as a material for constructing kettle handlers, insulators and oven covers, because, a high amount of heat will cause only a small change in temperature and the material won't get hot too fast!
H. Making generalizations and abstractions about the lesson
The amount of heat needed by a material to increase its
temperature by a degree is called heat capacity (C). To be more specific, the term specific heat capacity (c) is used, and this refers to the amount of heat required to increase the temperature of one unit mass of a given material by one Celsius degree. For example, water has a specific heat capacity of 1 cal/g°C. So it takes 1 calorie of heat to raise the temperature of 1 gram of water by 1°C. It is expressed in the equation:
H = mc ∆T
Where: H is the amount of heat, C is the specific heat, and
∆T is the change in temperature
Different materials have different specific heat capacities. Many metals have low specific heat capacities. This makes them easy to heat up and cool down. Water, on the other hand, has a high specific heat capacity and so it takes a long time to heat and a long time to cool. This makes the water a good coolant for car radiators. Because of its high specific heat capacity, it can absorb a large amount of heat without causing its temperature to rise too high.
I. Evaluating Learning
Direction: Read the statement carefully and choose the best answer.
1. The amount of heat required to raise the temperature of a body by 10C is called ______?
A. Specific heat B .Heat
C. Temperature D. Heat capacity 2. The amount of heat required to raise the temperature of a unit __________of a material by 10C is called its heat capacity.
A. Volume B. Mass C. Weight D .Density 3.The specific heat capacity of water is
A.1 cal/g°C B.1.5 cal/g°C C.1 cal/g°C D.1.1 cal/g°C 4. Which of the following statements about heat capacity is correct?
A. The energy that is transferred from one object to another B. The difference between internal and external energy
C. The amount of energy needed to raise the temperature of a substance by 1 degree Celsius
D. The amount of energy that is naturally within an object 5. Why does the temperature of the ocean not fluctuating as much as the temperature of sand?
A. Water has higher heat capacity.
B. Neither of these answers are correct.
C. Both of these answers are correct.
D. The mass of the ocean is greater
6 .A substance with higher specific heat will ________.
A. warm faster than other substances B. warm slower than other substances C. cool faster than other substances
D. warm at the same rate as other substances
7. Why does the temperature of the ocean not fluctuating as much as the temperature of sand?
A. Water has higher heat capacity.
B. It takes a short time to heat.
C. Water has low specific heat capacity.
D. The mass of the ocean is greater.
8. The quantity of heat required to increase the temperature of a unit mass of the substance by 1oC is called ________.
A. heat B. internal energy C. temperature D. heat capacity 9. Metals are both good heat conductors and electrical
conductors because of the
A. similarity between thermal and electrical properties.
B. looseness of outer electrons in metal atoms.
C. relatively high density of metals.
D. high elasticity of metals.
10. Which of the following statements about heat capacity is correct?
A. The energy that is transferred from one object to another B. The difference between internal and external energy
C. The amount of energy needed to raise the temperature of a substance by 1 degree Celsius
D. The amount of energy that is naturally within an object
J. Additional activities for application or remediation
Define the following terms:
1. electricity 2. electric current 3. voltage 4. ammeter 5. voltmeter
V. REMARKS
VI. REFLECTION
A. No. of learners who earned 80% in the evaluation
B. No. of learners who require additional activities
for remediation who scored below 80%
C. Did the remedial lessons work? No. of learners who have caught up with the lesson
D. No. of learners who continue to require
remediation
E. Which of my teaching strategies worked well?
Why did these worked?
F. What difficulties did I encounter which my
principal or supervisor can help me solve?
G. What innovation or localized materials did I Use or discover which I wish to share with other teachers?
GRADES 1 to 12 School Grade Level Grade 8
Daily Lesson Log Teacher Learning Area Science
Teaching Date and
Time Quarter First (Physics)
DAY:
I. OBJECTIVES
A. Content Standards
The learners demonstrate an understanding of current-voltage-resistance relationship, electric power, electric energy and home circuitry.
B. Performance Standards The learners shall be able to practice safety in handling electrical