Lecture 4.3b

What is the primary purpose of recycling waste materials?

• To increase the amount of waste in landfills

• To extract raw materials or make waste materials fit for reuse

• To create more non-biodegradable materials

• To increase energy demands

Which of the following is NOT a reason to recycle?

• Finite resources

• Reduces energy demands of extracting and processing raw materials

• Increases the amount of pollution in landfills and oceans

• Waste materials, especially plastics, are not biodegradable and take many years to break down

How does recycling help in reducing pollution?

• By increasing the amount of waste in landfills

• By reducing the amount of waste that ends up in landfills and oceans

• By creating more non-biodegradable materials

• By increasing energy demands

Why is it important to recycle plastics?

• Because they are biodegradable and break down quickly

• Because they are not biodegradable and take many years to break down

• Because they increase energy demands

• Because they are infinite resources

Which of the following is a major part of everyday life but also leads to abundant waste?

• Metals

• Polymers

• Glass

• Wood

What can certain polymers be converted into?

• Metals

• Glass

• Fuels

• Wood

What is the most labour and energy-intensive part of recycling polymers?

• Melting polymers

• Sorting polymers by types

• Transporting polymers

• Burning polymers

On what basis are polymers sorted before the recycling process?

• Size and shape

• Weight and volume

• Physical and chemical properties

• Cost and availability

Which of the following is NOT a property used to sort polymers?

• Colour

• IR absorption

• Density

• Weight

What are polymers constructed from?

• Atoms

• Monomers

• Ions

• Electrons