Question

What are the different properties of matter that can make it harmful or useful to minimize waste?.​

Answer 1

Answer:

Content Standards :

 demonstrates ways of identifying useful materials using the 5R techniques for aesthetic and economic purposes.

 demonstrates understanding of good practices such as reading product labels, and storing harmful materials at home and in school.

Performance Standards :

 helps minimize waste by:

– reusing and repairing objects and materials;

– practicing the habit of reducing the amount/volume of different materials;

– creating useful and valuable products from recyclable materials.

 practices the habit of reading labels in food products, garments, household materials, and medicines for health and safety reasons.

 follows instructions written on product labels when handling, using and storing materials/products.

Learning Competencies :

 uses the 5Rs (recycle, reduce, reuse, recover, and repair) techniques for aesthetic and economic purposes.

 sorts materials at home as useful or harmful.

 investigates the techniques of storing and safekeeping techniques done at home.

 communicates the results of the investigation.

 communicates good practices and safety precautions in storing and safekeeping of useful and harmful materials.

 communicates the importance of reading product labels such as those in food products, garments, household materials and medicines.

 infers the amounts of ingredients in food from product labels.

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Answer 2

Answer:

We need to know what materials are useful and harmful for us to avoid accident or harm. Key Notes: Materials are considered useful when it serves a purpose. These materials may have properties such as durability, resistance to water, heat, or acid, flexibility, elasticity and hardness.