Q1-SCIENCE 4 WEEK 2 PPT.pptx

SCIENCE 4QUARTER 1 - WEEK 2  DAY 1 Learning Objectives: At the end of the lesson, the learners should be able to describe the chemical properties of materials such as they can be burnt. Directions: Draw a happy face if the following pictures show chemical change and a sad face i...

SCIENCE 4QUARTER 1 - WEEK 2  DAY 1 Learning Objectives: At the end of the lesson, the learners should be able to describe the chemical properties of materials such as they can be burnt. Directions: Draw a happy face if the following pictures show chemical change and a sad face if it is not. Describe the chemical properties of materials such as they can be burnt. Divide the class into 5 and let them do the activity provided in the Worksheet Day 1 Task 1. A chemical property of a material is observed when one material reacts with other material chemically. Combustibility is the ability of a materials to be burned. Flammability is the ability of a material to ignite or catch fire easily. Examples of combustible materials: paper, cloth, dried leaves, wax, saw dust, rubber band. Alcohol and kerosene are combustible materials. They are also flammable because they catch fire easily which make them burn so fast. Emphasize that not all combustible materials are flammable. Combustible and flammable materials should be properly handled when using them because they are highly reactive when exposed to heat or fire. Describe the properties of the following materials. In your Science notebook, write COM if it burns, FLA if it catches fire easily and BOT if both. Describe the chemical properties of materials such as they can be burnt. EVALUATION: Classify the following materials according to their chemical properties. Write your answer on your science notebook.  DAY 2 Learning Objectives: At the end of the lesson, the learners should be able to describe the chemical properties of materials as they react with other materials. Why iron nails form rust? The lesson today is all about the chemical properties of materials as they react with other materials. Divide the class into 5 and let them do the activity provided in the Worksheet Day 2 Task 1. Chemical property is a property of materials wherein the composition has to change first before a certain property can be observed. Chemical Properties of Materials 1. Formation of a new product. When an iron nail is exposed to air (oxygen and water), rust will form. 2. Formation of gas. When baking soda is mixed with vinegar, bubbles are formed that indicate gas formation. 3. Formation of precipitate. When milk spoils, precipitate formed. Precipitate is the solid particles that settle in the spoiled milk. Observe the different materials stated below. Check the box that corresponds to the chemical property of each materials. Write your answer in your science notebook. The teacher will highlight the different chemical properties of materials. Assessment: 5 minutes Answer the following questions. Write your answer in your science notebook. Why is it important to know the chemical properties of materials?  DAY 3 Learning Objectives: At the end of the lesson, the learners should be able to describe the chemical properties of materials as degradable or biodegradable. Classify them as to materials that decay easily and materials that do not decay easily. paper Banana peeling malunggay leaves plastic bottles disposable spoon twigs Task/Question 1. Complete the graphic organizer. Identify materials that decays easily at home and at school. Write your answer in your science notebook. Degradability is the property of a material to decompose chemically or biologically. Biodegradability is a chemical property of materials that easily decompose or decay through the actions of bacteria or other living organisms in the soil. When materials decay their materials return to the soil. Materials like plastics and cellophanes are also biodegradable since their chemical composition allows them to decay but it will take them years to decay or decompose fully. Carefully observe the following materials. Check the box that corresponds to the chemical property of each material. The teacher will highlight the importance of describing the chemical properties of materials as to biodegradability and nonbiodegradability. Reflection: Complete the following sentences based on your experiences while doing the activities. 1. The part of the activity that I enjoyed doing was _________________________________. 2. The part of the activity that I find challenging was ______________________________ 3. I believe I need more activities because _____________________________. 5. I am now confident to describe the biodegradable and nonbiodegradable because ___________.  DAY 4 Learning Objectives: At the end of the lesson, the learners should be able to describe the chemical properties of materials, such as they can be burnt, react with other materials, or are degradable or biodegradable. Give the word formed from the following jumbled words. BUSBITILITYCOM MAFLAMTYLIBI DAGRADEBIOLIBITY GRANONBIOLIDEDALITY Divide the class into. Conduct a school environment scanning. List the materials that are commonly disposed inside and outside the classrooms. Classify them as combustible, flammable, biodegradable and nonbiodegradable. Write the list in your notebook. Describe the chemical properties of materials. Combustibility Flammability Biodegradability Nonbiodegradability Carefully examine the materials given below. Identify whether they are combustible, flammable, biodegradable and nonbiodegradable by putting a checkmark (√) on the proper column. Do this in your Science notebook. Reflection: Read the statements carefully. Rate the knowledge and skills you acquired and developed after going through the different tasks. Check the appropriate column that best describes the level of your knowledge and skill. Write your score at the last column, then give your total score. Reflect on the interpretation of your score.