Complete the sentences:
The double bonds in alkenes can open up and join together to make ____________. The individual, small alkenes are called ____________. This is ___________ polymerisation.

What is the notation for repeating units of a polymer?

Polymers are very unreactive. Why might that be advantageous?

Polymers are very unreactive. Why might this be disadvantageous?

What are the 3 ways by which plastics can be disposed?

Where are waste plastics usually buried?

Burying waste plastic in landfills is generally used when the plastic is...

What are the disadvantages of burying waste plastic in landfills?

Why should we recycle plastics?

Describe two ways in which plastics can be recycled

What are the advantages of burning waste plastic?

What are the disadvantages of burning waste plastic?

How can the process of burning waste plastic be controlled to reduce toxic gases?

What can biodegradable polymers be made out from?

What are the advantages of using renewable raw materials?

What are the disadvantages of using renewable raw materials?

Describe the use of polyethene with starch grains

What other things could scientists to make processes involving polymers more environmentally-friendly?