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Science 5 1.1 Properties of Materials at Home.pdf
- 1. Lesson 1.1 Properties of Materials at Home
- 2. Objective identify some properties of materials that are commonly used at home. 1 At the end of the lesson, you should be able to:
- 3. Learn about It! In describing properties of materials, it is important to recognize the observable characteristics based on its physical appearance. Some of these observable characteristics are color, shape, and size. Describing Properties of Materials
- 4. Lets Think! How will you describe the material below? A garden hose
- 5. Learn about It! Most garden hose is long and slender to allow water to travel long distances from the faucet as it source to di鍖erent areas in the garden. Often, it is green so that it compliments to the color of the grass when laid on the ground and not in use. Describing Properties of Materials A garden hose
- 6. Learn about It! Texture is the way that something feels when touched. What is texture?
- 7. Lets Think! How will you describe the texture of the given materials? Brushes used as cleaning materials.
- 8. Learn about It! Cleaning materials like a brush, dishwashing sponge, and steel wool have rough surfaces to be able to remove dirt on the materials in which they are in contact. However, the handles of cleaning brushes have rugged surfaces to allow hands to have a better grip on when using them. Describing Properties of Materials Brushes used as cleaning materials.
- 9. Learn about It! Thermal conductivity is the ability of an object to allow heat to pass through it. Conductors are materials that allow heat to pass through them easily. Insulators are materials that do not allow heat to pass through them easily. What is thermal conductivity?
- 10. Lets Think! How will you describe the thermal conductivity of the given material? A casserole
- 11. Learn about It! A casserole is made up of a metal body but the handles are made up of plastic. Metals allow food inside it to be cooked. The handles of cooking pans and utensils are made up of wood or plastic which are insulators. Describing Properties of Materials A casserole
- 12. Learn about It! Transparency is a property of a material that describes the ability of light to pass through. Materials that allow light to pass through are called transparent materials. Materials that do not allow light to pass through are called opaque materials. Materials that allow some light to pass through but also absorbs some light are known as translucent materials. What is transparency?
- 13. Learn about It! A drinking glass is transparent while a medicine bottle is opaque. Stained glass windows are translucent materials. Examples of Materials with Di鍖erent Transparencies drinking glass medicine bottle stained glass windows
- 14. Learn about It! Absorbability refers to the ability of a material to absorb or take in certain materials, usually liquids, in a gradual manner. Waterproof materials repel liquids, speci鍖cally water. Absorbent materials absorb liquids like water. What is absorbability?
- 15. Learn about It! Sharpness is the quality of being sharp. Flexibility is the ability of a material to be bent without breaking. Hardness is the condition of being rigid and unbreakable. Luster is the ability of an object to shine when light strikes on it. Other Properties of Materials
- 16. Learn about It! Materials at home may also be grouped as synthetic or natural. Natural materials directly came from the environment. Synthetic materials are human-made materials that are either produced industrially or commercially. Natural vs Synthetic
- 17. Key Points Materials at home are described based on its physical appearance. 1 Some properties that are used to describe materials are color, shape, size, and texture. Other properties of materials are thermal conductivity, transparency, sharpness, 鍖exibility, hardness, luster, and absorbability. Materials at home may also be grouped as natural or synthetic. 2
- 18. Check Your Understanding Identify the property of a material that is being described in each statement. 1. It is the ability to bend without breaking. 2. This tells the level of clearness of an object which allows light to pass through it. 3. It also means the condition of being pointy and sharp of an object. 4. It refers to the ability of a material to allow heat to travel through it. 5. This is the rigidity or the ability of an object not to be scratched easily.
- 19. Challenge Yourself It is common to see organic products in the market. Are organic products natural or synthetic?
- 20. Bibliography Peters, Joseph M. and Stout, David L. 2011. Science in Elementary Edition, Methods, Concepts, and Inquiries. Boston: Pearson Education, Inc., U.S. Handwerker, Mark J. 2004. Science Essentials Elementary Level. New York: Jossey-Bass Inc., U.S. Gega, Peter C. and Peters, Joseph M. 1998. Concepts and Experiences in Elementary School Science. New Jersey: Prentice Hall, Inc., U.S.