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LESSON 1.1

Unit 1: Energy in Society

Topic : Introduction to Physics and Technology

Time Frame: 1 day

I . OBJECTIVES

General Objectives

1. Cite the role of energy in the development of human society from the industrial

age to the knowledge-based society

2. Trace the development of technology in the country and relate it to international

and worldwide developments

3. State some worldwide developments in Physics that had implications to society

and had changed humanitys thinking about nature

Specific ObjectivesDemonstrate problem solving skills in science

II . SUBJECT MATTER

A. Lesson : Introducing Physics and Technology through Problem Solving

B. References

Department of Education, Culture and Sports. Bureau of Secondary Education

(1990). Science and technology IV. Quezon City: Instructional Materials

Corporation.

PASMEP. (1990).Resources for In-Service Program in Physics Education. Australia:Author.

UPNISMED. Training Report forDOST-PNU/RSTC 2002 Summer Enrichment

Program for Physics Majors.

A. Materials

Set 1: Newspaper, sticky tape, measuring tape, pair of scissors, stopwatch

Set 2: drinking straw, sticky tape, pair of scissors, five-peso coins or weights

Set 3: Newspapers, cardboards, cup of ice

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III. LEARNING ACTIVITIES

A. Review

Let students describe how useful their science lessons had been and the skills they

have learned.

B. Lesson/Activity Proper

1. Group students and give specific roles to each member of the group. A group

with five members is a good size.

2. Introduce problem solving activity. Be very clear about the task. [You may

vary activities from class to class]

3. Before letting them begin. Review or introduce briefly the problem solving

process. [see teachers notes]

4. Allow time for students to do the activity.

5. Conduct the test after the time allotted for the construction phase of the

activity.

6. Ask one of the successful groups to report on their design. Also ask one lesssuccessful group to describe how they may improve on their design.

C. Generalization

How can you apply problem-solving skills in daily life?

D. Values integration

1. working cooperatively in groups

2. positive attitudes towards Physics and technology

3. open-mindedness

IV. ASSESSMENT

1. Let students fill out Problem Solving Work sheet

2. Rate the group performance using suggested Problem-Solving Score sheet

V . ASSIGNMENT

Instruction

1. Ask students to construct a new device as an improvement of their previous

design. They must conduct carefully controlled tests to compare their previous,

with the new design. They must also submit a written report on what they have

done. Find time within the week to discuss their new outputs as this can be used

to introduce the scientific method.

2. Tell students to take note of the events/ materials that they encounter on their trip

home and back. To facilitate processing of their observations, you may give the

following table as guide:

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Table 1.1.1

Material/Event Question(s) I can ask about material / event that

can be answered through Physics.

Physics topic where

this material / event can

be explained

E.g. Cellphonetransmitter

How does this transmitter work?Why is it that not all places have cellphone

signals?


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Teachers Handout

PROBLEM SOLVING RECORD SHEET

Group No. __:

Members:

Activity Title Problem: Type of

Problem:

Construction Testing Discovery

What we did to

solve theproblem:

__________________________________________________________________________________________________

_________________________________________________

_________________________________________________

Sketch/Diagram of the Device/Model Constructed:

What Our

Group Found

out:

What our group

recommends to

improve the

design/ model

built:


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Teachers Handout

PROBLEM SOLVING SKILLS

Activity 1.1

Four Problem Solving Activities


CLARIFY what the Problem is about

discuss it with other students.

BRAINSTORMIdeas think aboutscientific ideas and methods which might be

useful in solving the problem.

THINK

about

different

strategies

that youcan use!

PLAN OUT what you are going to do

choose the best ideas and make a step-by-

step plan.

TRY OUT YOUR PLAN

Did your plan

SOLVE THE PROBLEM?

TRY

Another

plan

Yes

No

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Activity 1.1

Four Problem Solving Activities

I. Keeping Cool

Problem Situation:

Levi and Maricris have just started a summer business

of delivering ice cream and frozen delights to office

workers at break time.

Their delivery persons use bicycles with large

baskets fitted at the back to get through the busy streets. It takes about 30 minutes to

complete a delivery and it is important their frozen products do not melt.

Task:

Design and construct a container that prevents the frozen product (ice cup) from melting

using only the following materials:

1 piece of cardboard

1 whole sheet newspaper

1 meter sticky tape

II. Large Barge Contest

Task:

To construct a barge that can support the greatest load

without sinking.

Rules:

1. Each team shall be given a piece of aluminum foil not more than 30 cm-long. The

team may opt not to use all of the aluminum foil for the task.

2. The barge design and construction time should only take 20 minutes.

3. The barge should only be made from the aluminum foil. Glue, tape, paper clips or

adhesives are not allowed.4. The barge shall be loaded while it is floating on a basin of water. The barge is

considered to have sunk if water leaks into the barge while it is being loaded.

5. Each team shall be given two loading attempts should the barge sink at first trial.

The team may repair their barge but they will not be given additional material for

the repair.

6. The barge that supports the heaviest dry load will be adjudged the winner.


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III. Design and Build your own Shelter

Task:

Design and construct a shelter from materials listedbelow. The Shelter must be able to accommodate

most, if not, all of the members of the team. It must

also be able to stand by itself for at least 5 minutes

after it has been constructed.

2 meters masking tape

2 meters string

30 newspaper sheets

Rules:

1. Each entry shall be given 30 minutes to design and construct their shelter.2. The shelter shall be judged according to the following criteria:

Design and

Construction

Effectiveness of Design;

Care in Construction;

Originality

5

Scientific

Testing and

Discovery

Choice of method; Use of

controls; Quality of Results;

Understanding of relevant

scientific ideas

4

Defense /Report Clarity of report;Communication of ideas 1

T O T A L 1

3. In your design, you are to indicate the forces acting

on the shelter you constructed. Your defense should

also include presenting the important features of

your design that resulted to a stronger structure.

4. Only teams whose shelter was able to stand by itself

for at least 5 minutes will be asked to present their

defense.


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IV. A Bridge Too Far

Task

To design and construct a bridge given materials and specifications

Materials

4 drinking straws, 1 short bond paper, 10 pieces dressmakers pin, 1- metre sticky tape,

5- P5.00 coins

Procedure

Design and construct a bridge that is about 5 cm high, 5 cm wide and has a span of

about 25 cm. The bridge should be able to support a load equivalent to the weight of afive-peso coin.


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