W1 Science.pptx harmful and useful materials

harmful and useful materials harmful and useful materials harmful and useful materials harmful and useful materials harmful and useful materials harmful and useful materials harmful and useful materials

1. Properties of Matter (Harmful or Useful Materials) Day 1

2. 1. Why is metal commonly used as the main material for making cooking pots?

3. What would occur if cooking pots were constructed from wood, plastic, or paper?

4. Two classifications of properties of materials   Physical Properties Chemical Properties

5. 1. Physical Properties Refer to the characteristics of matter that can be observed or measured without changing its composition.

6. 2. Chemical Properties Refer to the internal composition of matter that can be measured and observed when matter undergoes change to become an entirely different substance. *Combustibility refers to the ability of a material to catch fire and burn when exposed to heat or an open flame. * Toxicity Refers to the degree to which a substance can cause harm, illness, or adverse effects when it comes into contact with living organisms. *Flammability M aterials have a lower ignition point and catch fire more easily

7. Categorize the given properties as either physical or chemical. Record your responses in your notebook. Hardness Combustibility Elasticity Toxicity 5. Malleability

8. Identify the Property of the following materials.

9. Suppose you were creating a toy; which material would you select to ensure its safety during playtime?

10. Read each item carefully and choose the letter of the answer. Write the letter only. Write your answers on your notebook. 1. What property does gold possess that allows it to be shaped into rings? a. Hardness b. Elasticity c. Strength d. Malleability 2. Why can rubber bands be used to tightly secure things and return to their original shape after stretching? a. Hardness b. Elasticity c. Strength d. Brittleness

11. 3.When wood is turned into chopping boards, which property of wood is utilized? a. Hardness b. Elasticity c. Strength d. Brittleness 4.Among the following solids, which one does not belong to the group? a. Gold bracelet b. Iron nail c. Silver ring d. Plastic spoon 5.What makes metals highly valuable and practical? a. They can be broken easily. b. They can be thrown easily. c. They can produce good sound. d. They are hard and can be shaped differently.

12. Properties of Matter (Harmful or Useful Materials) Day 2

13. Review

14. Using the given object, write as many characteristics or properties as possible to describe each object.

15. Matter is all around us. It can take many forms and has many properties. While some materials have useful properties, other materials can also be harmful.

16. Get Three Things Inside Your Bag and Identify each item and describe it. 1. 2. 3. Are these materials useful or harmful? Why ?

17. Provide at least one object that matches the specified property of the material.   1. elasticity- 2. malleability 3. combustibility 4. hardness 5. conductivity

18. Hardness Brittleness Flexibility Elasticity Conductivity Malleability

19. Based on the given objects presented in the table, write as many characteristics or properties as possible to describe each object. Object Characteristic (s) or Properties 1. chopping board   2. plastic plates   3. glass   4. rubber band   5. steel knife   hard magnetic strong clear corrosive smooth conductor elastic transparent durable malleable water and heat resistant

20. Properties of Matter (Harmful or Useful Materials) Day 3

21. What is the significance of studying the characteristics/properties of matter?

22. Have you ever seen this symbol? Halal - product is certified as safe for consumption (for Muslims)

23. Look at the Chart

24. Directions: Draw a happy face if the material is useful and sad face if it is not. candy wrappers made into bag a broken glass thrown in the backyard disinfectant bottles thrown everywhere a box made into a bookshelf leftover food from restaurants turned into fertilizers

25. Combustibility Toxicity Flammability

26. Identify whether the household material is useful or harmful, then determine the product label that would help you identify its category. Household Material Useful Harmful Product Label (Corrosive, Poisonous, Biodegradable, flammable, recyclable) 1 . Muriatic Acid / Corrosive/Poisonous 2. LPG 3. Paper Cups 4. Empty Plastic Bottles 5. Insecticides

27. Properties of Matter (Harmful or Useful Materials) Day 4

28. Look at the picture. Useful or Harmful? Explain your answer.

29. Write True if the statement is correct, and write False if it is not. 1. Consumers must read product labels when buying grocery items. 2. Place fertilizers in containers and label them as edible. 3. Throw away anywhere the plastic bottles after using them. 4. Labels are not important in classifying materials as to useful or harmful. 5. Food allergen warnings are helpful especially for those who have allergies

30. Various material possessed a useful and harmful compositions.

31. Materials are said to be useful when they serve their purpose. These may have properties such as durability, flexibility, elasticity, hardness, and resistance to water, heat, or acid. Most of the useful materials can be reused and recycled. For example, a container for solid or liquid, when it is already empty, can still be used for other purposes such as a flower vase, a coin bank, or a house decor.

32. Various materials can be located within our residences. These objects possessing distinct properties. Thus, it is imperative for consumers to peruse product descriptions. By examining these labels, consumers can ascertain the potential harm associated with the product. Among the pivotal components of a product label, expiration dates and indicators of perilousness stand out.

33. Complete the paragraph using the words listed below; purpose painful recycled useful harmful hazardouz Many materials and substances are _________at home and in school, but they can be ______ if not used properly. Materials are considered useful when they serve their _____. Some useful materials can be______, for example an empty container can be used as a house decor. But some materials can be ____________ like a broken glass jar that can cause cuts or injury.