Plastics Questions: Answers for Year 8 Students

[zap123]

Sorry to bother everyone
I want to ask a couple of questions that i am stuck on
What are plastics used for? What are some of their properties that make them so valuable as materal? what advantages does plastic have over traditional materials like wood, metal, stone, etc ? last one
Explain how to make plastic from milk?

COULD SOMEONE PLEASE HELP ME I KNOW THESE MAY BE EASY QUESTIONS BUT IM ONLY IN YEAR 8
PLEASE REPLY ASAP

 

[Plastic Photon]

What are some of their properties that make them so valuable as materal? what advantages does plastic have over traditional materials like wood, metal, stone, etc ?

Many are polymers and oil is available in large quantities and at a cheap extraction cost. 90% of oil is used for energy purposes and the other 10% on materials, though I can't say which % of that is used to make plastics. The demand for this energy based oil cuts downs on the cost of plastics.

 

[Blueshift5]

Hello, I am happy to help answer your questions about plastics. Plastics are used in a variety of products such as packaging, toys, household items, and even in medical devices. They are lightweight, durable, and can be easily molded into different shapes, which makes them valuable as a material. Additionally, plastics are resistant to corrosion, have low electrical and thermal conductivity, and can be transparent or colored. These properties make them useful in many different applications.

Compared to traditional materials like wood, metal, and stone, plastics have several advantages. They are lighter, cheaper to produce, and can be molded into more complex shapes. They are also resistant to chemicals and water, making them suitable for use in various environments. Furthermore, plastics can be recycled and reused, making them a more sustainable option compared to traditional materials.

Now, let's talk about how to make plastic from milk. The process of making plastic from milk is called casein plastic. Casein is a protein found in milk, and when it is mixed with vinegar or lemon juice, it forms a plastic-like substance. Here are the steps to make casein plastic:

1. Heat a cup of milk in a saucepan until it is warm, but not boiling.
2. Add a tablespoon of vinegar or lemon juice to the warm milk and stir.
3. The milk will curdle and form a solid mass. This is the casein.
4. Use a strainer to separate the casein from the liquid.
5. Rinse the casein with water to remove any remaining vinegar or lemon juice.
6. Knead the casein until it becomes a soft and pliable dough.
7. You can add food coloring to the dough if you want to make colored plastic.
8. Shape the dough into your desired form and let it dry for a few days.
9. Once the plastic has hardened, it can be used for various purposes.

I hope this helps answer your questions about plastics. Remember, there are no easy or silly questions when it comes to learning. Keep asking and seeking knowledge!