Nanoparticles

Question 1

What is a nanoparticle?

Answer 1

It is a structure that is 1-100nm in size. It contains a few hundred atoms

Question 2

How to calculate surface area of a whole cube

Answer 2

Calculate area of one side then times it by six

Question 3

How to calculate the volume of a cube

Answer 3

l x b x h

Question 4

Benefits of using nanoparticles of zinc oxide in sun cream

Answer 4

They give better skin coverage.
Provide more effective protection from UV rays.
Are clear and colourless which makes it easier to rub in
Do not degrade on exposure to the sun.

Question 5

Risks of using nanoparticles in sun cream

Answer 5

There is the potential for cell damage in the body. NP are so small they can be breathed in.
Harmful effects on the environment