A Lesson Plan in Science II (Ecology)
I. Objectives:
With the use of the video presentation and varied activities, the second year high school students with at least 85% accuracy should be able to do the following:
- a. explain Global Warming in different perspectives
- b. demonstrate some ways on how to prevent or to lessen the effects of Global Warming
- c. appreciate the role of Environmental Programs in preventing or at least lessening the effects of Global Warming
II. Subject Matter:
Concept: Environmental Issue
Topic: Global Warming
Skills to be developed: critical thinking, debating or reasoning, researching
Values to be developed: awareness, sense of responsibility, teamwork
III. Instructional Materials:
Textbook: Añes, Myrna, Lee, Sergio, LECTURE NOTES IN ENVIRONMENTAL SCIENCE: THE ECONOMY OF NATURE, pp. 150-157
Scaffolds: video presentation downloaded from Youtube entitled "Global Warming: A Point of No Return & "What is Global Warming", comic's strips entitled "The Day the Earth Stood still or Crisis, what crisis?
IV. Procedure:
A. Opening Activity
- The teacher will ask a motivating question, "How do you find the summer vacation?" (The expected answer from the majority of the students will be "The weather is so hot"). "How can you describe the temperature this year than the previous years?" (Varied answer is expected.)
- The teacher will now show a video presentation downloaded from Youtube.
- After the presentations, the student will now group into four groups. They are going to role play some ways on how to prevent or lessen the effects of global warming.
- The teacher will be the one to critic their role play presentation.
- The best role play will be given 20pts. Each member of the group and the rest will be 15pts.
1. Analysis
- Physical: What will happen to the physical condition of the earth if global warming continues?
- Biological: How does global warming affects the lives of the people as well as the other living things?
- Economic: Was the world's food supply and the prices of other products has been affected by the global warming? In what way?
- Social: What will you do to minimize the effects of global warming? How are you going to influence others to minimize the overpopulation of harmful greenhouse gases?
- Political: What government agencies do to help prevent the effects of global warming? What Environmental Programs you know that concerns with the prevention of global warming?
- Communicative: How did government as well as others implement it?
- The students will be group into four groups. Each group will be given a comic strip related to the topic global warming.
- They are going to interpret the message of the comics. Then they are going to answer the follow-up questions.
- The answers will be written in a one whole sheet of intermediate pad.
- What is the message of the story?
- What is the main problem in the comics?
- Why do people in the planet Earth are not aware of their Environmental problem?
- What is the role of the Martians (aliens) in the comics?
- What behavior does the people on Earth shows?
- What statement in the comics do you find relevant? Why?
- Application (DEBATE)
- The students are going to group into 2 groups (TEAM YES and TEAM NO). Each group will be given 10 mins for their speeches.
- Each team will be given 20pts for their oral recitation.
- The class will now again form into four groups. Each group will create an "Environmental Program" of their own.
- They will state the Environmental Program's goal, mission and vision.
- After planning, they will present to the class of what their environmental program all about and how they are going to implement it.
Directions: Write your answer in a one whole sheet of paper.
- Draw an illustration on how global warming occurs.
- Make a schematic diagram showing the causes and effects of global warming.
- Research on some areas here in Cebu that is most likely can be affected with the increase of sea level?
Heat Transfer
We can encounter heat transfer in our daily life. This is what we usually observe when we boil water in a pot.
Here are some inputs that defines Heat Transfer:
- Heat always moves from a warmer place to a cooler place.
- Hot objects in a cooler room will cool to room temperature.
- Cold objects in a warmer room will heat up to room temperature.
There are three methods of Heat Transfer: Conduction, Convection and Radiation
Conduction
When you heat a metal strip at one end, the heat travels to the other end. As you heat the metal, the particles vibrate these vibrations make the adjacent particles vibrate, and so on, and so on, the vibrations are passed along the metal and so is the heat. We call this Conduction .
Metals are different.
The other electrons of metal atoms drift, and are free to move. When the metal is heated, 'this sea of elections' gain kinetic energy and transfer it throught the metal. Insulators such as wood, and plastic do not have this 'sea of electrons' which is why do not conduct heat as well as metals.
Why does metal feel colder than wood, if they are both at the same temperature?
Metal is a conductor, wood is an insulator. Metal conducts heat away from the hands. Wood does not conduct the heat away from your hands as well as the metal, so the wood feels warmer than the metal.
Convection
What happens to the particles in a liquid or a gas when you heat them? The particles spread out and become less dense. This effects the fluid movement.
Fluid Movement
Cooler, more dense fluids, sink through warmer, less dense fluids. In effect, warmer liquid and gases rise up. Cooler liquids and gases sink.
Radiation
How does heat get energy from the Sun to the Earth? There are no particles between the Sun the the Earth so it cannot travel by conduction or by convection. It is by radiation. Radiation travels in a straight line, can travel through a vacuum, requires particles to travel, and travels at speed of light.
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