Cambridge IGCSE Chemistry Flashcards on C2 - Material Choices, created by franimal on 20/10/2013.
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Created by franimal
over 10 years ago
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Created by franimal
over 10 years ago
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Why do materials need the right properties?
What's the definition of a polymer?
There are both synthetic and natural polymers. Why are we using more synthetic polymers than 20 years ago.
A material can be strong in tension and/or strong in compression. What does this mean?
What is a stiff material?
How can you tell if one material is harder than another?
If a material is heavy for its volume, what is it?
What is accuracy?
What is repeatable and reproducible?
Why do the factors not being tested have to be controlled, eg temperature?
What are the properties of a material based upon?
How many nanometres in a metre?
If a molecule such as wax has few atoms in each molecule, what's the effect?
On a molecular level what does vulcanisation cause?
What is plasticiser and what does it do?
What is LDPE or a non-crystalline polymer?
What is HDPE or a crystalline polymer?
What is crude oil?
What can crude oil be used for? Name three.
How is crude oil separated into groups of same-sized molecules?
What is nanotechnology?
Why do nanoparticles often have unusual or reactive properties?
Name three uses for nanoparticles.
Why are some doctors worried about nanoparticles?
