materials

Question 1

how do you find raw materials

Answer 1

in the earth example iron or limestone
the sea for example salt and bromine
the air for example oxygen or argon
crude oil for example plasitics and drugs
living things for example wool cotton wood or silk

Question 2

what are natural materials

Answer 2

materials that do not need to be processed by chemical methods

Question 3

what is a synthetic material

Answer 3

a materia;l that needs a chemical reaction to be made

Question 4

what is a smart material

Answer 4

a smart material is a material that changes how it behaves

Question 5

what is a thermochromic material

Answer 5

changes colour due to a change of temprerature

Question 6

what is a photochromic material

Answer 6

changes colour depending on their exposure to light

Question 7

what is the length of a nanometre

Answer 7

1x10-9

Question 8

give the advantages of the use of nanoparticles in sun cream

Answer 8

better skin coverage and more protection from the suns ultraviolet rays

Question 9

what is graphene

Answer 9

graphene was the worlds first two dimensional material and is a million times smaller than a human hair a layer of graphene is only a atom thick graphene is 200 times stronger than steel but incredibly lightweight and a good conducter of electricity and heat and can also increase the life of a battery

Question 10

what is foresenic science

Answer 10

is used to help to help fight crime there lots of ways in which science can help solve crimes

Question 11

what are the types of fingerprints

Answer 11

arch, loop, whorl and composite