Changes that materials undergo GRADE 5
- 2. Learning Objectives: The learners demonstrate understanding of materials undergo changes due to oxygen and heat; Investigate changes that happen in materials under the following conditions; presence or lack of oxygen and application of heat. And; Identify the physical properties of solid materials such as ductility, malleability, flexibility, elasticity, porosity, hardness and brittleness. 1. 2. 3.
- 3. Activity #1: Classify each materials as useful or harmful. Old news paper vegetable scraps old toys lotion insect repellent medicines paint drugs
- 4. Let us Review 💡 Identify the following objects as solid, liquid, gas. Write your answer on the blank after the number. Vinegar Stars Chalk Smoke Paper Air 1. 2. 3. 4. 5. 6.
- 6. Ductility Property of solid to be transformed into wires. EXAMPLES: Aluminum, Copper, Gold, Silver
- 7. Porosity the ability of a material to hold liquid to a certain extent. EXAMPLES: Sponge, Cotton, Fabric
- 8. property of solid to be broken into pieces. EXAMPLES: Ceramics, Glass Brittleness
- 9. property of solid to return to its original shape after being streched. EXAMPLE: Rubber bands, tires, baloons ELASTICITY
- 10. Property of solid to be hammered into sheets. Example: Tin cans, aliminum sheet Malleability
- 11. the ability of the material to be bent without breaking EXAMPLES: Plastic Ruler, Alambre, Paper Clips Flexibility Flexibility
- 12. Magnetic the ability to attract material. Example: Magnet
- 13. HARDNESS the ability of a material to resist after being pressed and scratched. EXAMPLE: Diamond, Metal, Wood
- 14. EVALUATION Identify the physical properties of solid materials.
- 15. Assignment Assignment List atleast 3 examples of solid materials in your home that possess the following properties. 1. Porosity 2. Brittleness 3. Elasticity