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What are degradable plastics?
Degradable plasticsA number of UK retailers have recently introduced degradable carrier bags. These bags are made from plastic which degrades under certain conditions or after a predetermined length of time. There are two types of degradable plastic: bio-degradable plastics, which contain a small percentage of non oil-based material, such as corn starch; and photodegradable plastics, which will break down when exposed to sunlight.Degradable plastics are already being used successfully in Austria and Sweden, where McDonalds has been using bio-degradable cutlery for three years. This enables all catering waste to be composted without segregation. Carriers for packs of beer cans are now being manufactured in a plastic which photo-degrades in six weeks. There is also potential to use such plastics in non-packaging applications such as computer or car components.There are a number of concerns over the use of degradable plastics. First, these plastics will only degrade if disposed of in appropriate conditions. For example, a photodegradable plastic product will not degrade if it is buried in a landfill site where there is no light. Second, they may cause an increase in emissions of the greenhouse gas methane, as methane is released when materials biodegrade anaerobically. Third, the mixture of degradable and non-degradable plastics may complicate plastics sorting systems. Last but not least, the use of these materials may lead to an increase in plastics waste and litter if people believe that discarded plastics will simply disappear.
What are the effects of waste?
the waste is very harmful. it can cause the death and diseases. If the waste is recycled it may not be harmful. but there is a non degradable waste which is most harmful namely plastic or polythene. if it is left in free air it pollutes the air. if in soil it pollutes soil. thus if it is left free anywhere it spoils the thing. so the polythene and plastic has a harmful effect on the environment. so the " degradable plastic "should be used. or a new degradable alternative of plastic should be invented. there are two types of wastes : solid , liquid . the waste not only harms on human health but it also effects on the health of all the organisms. Thus it is very harmful.
What are the two main sources that plastic is made from?
Oil and Plants
What are the two human made objects found in the troposphere?
Weather
What are 3 things that friction can do between two objects?
Heat,wear,and static electricity(depending on what the objects are made of).
Is wood and plastic an thermal insulator?
No. Wood and plastic are two materials, not one.They can be insulators, or a composite made from wood and plastic could be an insulator but THEY cannot be ANinsulator.
What are two rhyming words that will describe a dessert made out of plastic?
fake cake
What are two different type of materials toy cars are made of?
plastic and rubber:))
When you rub two balloons together will a plastic bag stick to the balloons?
Yes, when you rub two balloons together, they will create a static charge. This static charge can attract lightweight objects like a plastic bag, causing it to stick to the balloons.
Name 2 objects that are made of a single material?
A metal spoon and a glass cup are two examples of objects made of a single material.
Is there more than one way yo get two objects with identical masses?
Yes, you can have two objects with identical masses by either having two objects made from the same material and dimensions or by adjusting the quantities of different materials to have the same mass.
Will two objects always have the same density?
No. Two objects could have the same density but they also could not. If the two objects were not made from the same substance they would not have the same density. Although if they did then they would have the same density.
