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What are plastics? Name four things that are made up of plastics.
- Plastics are a wide range of synthetic or semi-synthetic organic compounds that are malleable and so can be moulded into solid objects.
- Plastics are made from natural materials such as cellulose, coal, natural gas, salt and crude oil through polymerisation or polycondensation process.
- We need plastics because it is durable and provides protection from contaminants and the elements. It reduces food waste by preserving food and increasing its shelf life. It protects food against pests, microbes and humidity.
- As plastics are not degraded easily, it can remain for a long period of time. Plastic pollution on land poses a threat to the plants and animals – including humans who are based on the land.
- Chlorinated plastic can release harmful chemicals into the surrounding soil, which can then seep into groundwater or other surrounding water sources and also the ecosystem of the world.
Four things made out of plastics are plastic chairs, bottles, plastic bags, straws.
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- Name four things that are made up of plastics.
- What are plastics? Name any five commonly used articles made of plastics.
- Buckets made up of plastics are better. Why?
- Name some substances which are made from plastics.
- Name four different plastics.
- Explain why, frying pan handles are made of thermosetting plastics.
- Why are electric witches, plugs and sockets made of thermosetting plastics?
- What are the various types of plastics? Give two examples of each type of plastics.
- (a) What are thermoplastics? Give two examples of thermoplastics.(b) What are thermosetting plastics? Give two examples of thermosetting plastics.
- What properties of plastics make it useful for many things?
- Are switchboards an example of thermosetting plastics?
- Give examples to show that plastics are noncorrosive in nature.
- Explain why the following are made of thermosetting plastics :Saucepan handlesElectric plugs/switches/plug boards.
- Give examples to show that plastics are non-corrosive in nature.
- Name five things made up of five different kinds of elements
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