Describe the constituents of plastics

Oil and natural gas are the main raw materials which (can use) in the production of plastics.Plastics (will use) in the production of a wide range of household appliances.The car industry (may use) high-precision components in their vehicles.The majority of plastic parts (could not manufacture) using injection molding many years ago.Manufacturers (could not make) make plastics to a high standard of quality before they started to use oil.Soon plastics (will make) from any kind of plant material.

P _ _ _ _ _ _ for plastic is organic compounds added to a polymer base to give a specific color to plastics.

Which of the following is used in the production of Plastic?*1 pointMercuryLeadVinyl chlorideNone of these

Read the text below about plastic and complete the text using the active or passive form of the verbs and modal verbs in brackets. One gap can be filled with the active or passive of the verb.Plastics (will give) additional characteristics such as fire retardancy to allow them to be used in aircraft parts in the future. Injection-moulded parts (may include) glass or carbon fibres for strength. Plastics (can mould) with a foaming agent which (will reduce) the density and hence the weight of the final component and reduce the material required so reducing the cost. The list of plastics appears to be endless but they fall into two categories, thermoplastics and thermosets. Thermoplastics (can melt and recycle) into new parts. Thermoset plastics are stronger than thermoplastics but (cannot recycle) into new parts and have to be disposed of in other ways.

Read the text about Plastic and The Environment and fill in the summary below with NO MORE THAN TWO WORDS.Plastic and The EnvironmentPlastic is a material we use every day. The first plastics were made more than 100 years ago from parts of plants. Plastics are now made from oil, coal and natural gas. We are using up these things so fast that the Earth's supplies may run out. Because of this, scientists are investigating new ideas for making plastics from plants such as sweet potato, bamboo and flax.Things made from plastic can be useful for people but bad for the planet. Some plastics can last for a long time without wearing out, and can be difficult to get rid of when they are not needed. They can remain in rubbish dumps called landfill sites for hundreds of years. Landfills can be smelly, ugly, and harmful to our planet.Recycling is a good way to get rid of unwanted plastics. Recycled waste materials can be used again to make new products. This can be difficult as different types of plastic need to be recycled in different ways. Some kinds of plastics can be melted down and used to make new things such as bags and bottles. Others can be made into fibres (strands of material) for clothing.Another way to protect the environment is to use canvas bags for shopping rather than plastic ones. A lot of plastic objects can also be reused. Plastic bottles can be refilled many times, rather than throwing them away once they are empty. Unwanted plastic goods such as CDs and toys can be sold or given away to charity shops.Summary:We use plastic every day in life. People can find (1) plastic products but bad for the planet. Because of this, scientists are finding new ways of making plastics from (2) like sweet potato, bamboo or flax. Different types of plastic need to be (3) in different ways. Some kinds of bags and bottles can be remade from (4) plastics. Besides, instead of using plastic bags, (5) for shopping can be a better choice. Plus, people can sell or give away to charity shops unwanted plastic goods such as CDs and toys.