Answered

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uestions: 1. From the given pictures above, what are the useful materials that can be found at Home In school And in the community 2. Why do you consider those materials useful? 3. How did you classify the materials? 4. Why do we need to know the uses of the different materials? 5. Why do we need to classify the materials as useful or harmful? What's the meaning? There are materials that can be found at home, in school and in the community improve your health, destroy harmful organisms, make life more comfortable, make vork faster and easier and help protect and conserve the environment These pls help
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Sagot :

yuanx16

Answer:

1. old newspapers,  candy wrappers , vegetable peelings , food cartoons , Harmful Materials , empty shampoo bottle , single-use plastic bags , single-use plastic bottle , empty hair gel container , empty mayonnaise jar(glass).

-When you recycle it,they become useful.Old newspaper can be a flower vase,candy wrappers into decorations,and more.

2. they have particular qualities, which we call their properties. Understanding these properties is what materials science is all about.

3. part of materials science involves classifying materials: putting them into groups. Materials are generally split into four main groups: metals, polymers, ceramics, and composites. ... They can be further split into ferrous metals and alloys and nonferrous metals and alloys.

4. So that you won't get curious of the use of the materials and make your work easier.

5. 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.

Explanation: hope it helps

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