You already know how to recognize useful and harmful materials. You can now apply what you have learned in the management of waste. Fill in the K-W-L chart about management of waste. Management of Waste What I Know What I Want to Know What I Learned
Identify the different waste that you can see in the photo. Classify waste material which can be recycled, reduced, reused, repaired and recovered.
Suppose you have come across on this area on your way home, what will you do?
Watch the video to be played. List down important details about the topic. Answer the comprehension questions afterwards.
R ead the waste management using 5rs techniques on page 5-8 Deepening: Guide Questions: 1. What other common household materials can we apply the 5Rs techniques? Give example and the appropriate techniques to be used. 2. In what ways do the 5R technique help environment?
The 5r’s Reduce- Lessening the amount of waste in the environment. Avoiding the usage of disposable materials of a good example of reducing waste Reuse- means using the same material again for a similar purpose.
Recycle – this involves the creation of new product from a material that has already sereved its purpose. Recover - This involves harnessing energy from waste through certain processes like pyrolysis. Also other parts can be reused are recovered from waste in a materials recovery facility
Repair – fixing slightly broken things to make them useful again. This is not only helps us reduce waste, it also saves us money.
List Five (5) things found in your home that can replace with other materials to reduce garbage disposal. Example: Paper/Plastic cup- washable glass or mug.
How can you help make your community clean and better place to live in? How does reducing differ from recycling? What benefits can we get from recycling materials?
Do Let’s Check B on page 13. Last Saturday, the Aguirre family decided to have a general cleaning of their household. They started inside the house and discovered the following materials: See textbook.
Assignment List 5 different waste. Then, tell how will you manage it by. Choose from the 5 Rs techniques.
5 R’S TECHNIQUES Day 2
Complete the K-W-L chart about management of waste. Management of Waste What I Know What I Want to Know What I Learned
Let’s go beyond: There are two types of recycling, the Upcycling and Downcycling. 1.Upcycling- Is a way to make a higher material from its original value. 2.Downcycling - Converts waste materials into a new product with lesser quality.
Group Activity
Group pupils into 8. Gather each group and do the activity on Science Beyond Borders p. 10, Let’s Explore. Environment-Friendly Notepad Rubrics Can follow instructions correctly- 5pts Reuse papers for notepad- 5 pts Creativity- 5 pts Cleanliness- 5 pts Total- 20 pts
Environment-Friendly Notepad
1. Allow the learners to gather pad paper, or even colored paper. Tell them to check one side has writings. Keep those with writings on both side for other purposes 2. Instruct the learners to cut into their desired length and width those papers with writings only one side. 3. Ask the learners to bind the cut pieces of paper using glue or fastener. Tell them to make sure that the side with writings is on the underside as they bind each piece of paper. 4. Advise the learners to set aside and let it dry. 5. Tell them that they may now use the side without writing as their notepad.
Assignment Name things that can be reduce, reuse, recycle, repair, and recover.
Properties of materials whether they are useful or harmful Day 3
Identify the physical properties of matter. Show pencil and paper Describe the following. Size Color Texture Weight Shape
W ooden stick and a rubber band Ask: “ Why you can stretch the rubber band but not the stick?” Ask: “ Why the stick breaks but not the rubber band?
The properties of matter can be classified as physical properties and chemical properties. Physical Properties A characteristic of a material that can be readily observed without changing its composition is known as physical property. Hardness – is the ability of a material to be rigid and resist pressure that may cause a change in its shape. Brittleness – is the ability of the material to break easily.
Flexibility – is the ability of a material to be bent without breaking . Elasticity – is the ability of a material to be stretched and then return to its original shape after. Conductivity- is the ability to let heat and electricity to pass through. Malleability – is the ability of materials to be hammered into flat sheets. Ductility – is the ability to be drawn into thin wires.
Write true if the following statement is correct and false if not. Elasticity is the ability of a material to be stretched and then return to its original shape after. Wood can easily break. 3. Softness is one of the physical properties of matter. 4. Rubber tires are brittle. 5. Tiles are malleable.
The overuse of plastic bags adds to the garbage problem of our country. Do you think that using paper bags instead of plastic is more environmental friendly? Why?
What are Physical properties of matter?
Answer Let’s Check on p. 24 Match column A with the word in Column B. Do Let’s Recall on p. 24. Complete the diagram of the different properties of matter that you have learned.
Day 4
Identify what physical properties of matter are the following materials possessed. Wood Glass Ceramic Rubber band 5. Stone
Instruct the pupils to gather with group mates. Do Let’s Explore on p. 21, Science Beyond Borders Changes in Materials
Encircle materials that are hard and box the materials that are brittle. Wood tiles stone Glass, breaks , glass
Answer Let’s Check on p. 25 Classify the following materials based on the properties that they possess.
Assignment Answer the following questions. 1. What are the raw materials used in building bridges? 2. What physical properties do the raw materials of the bridge possess?