1. What is the typical size range for nanoparticles?

a) 1-100 micrometres
b) 1-100 millimetres
c) 1-100 nanometres
d) 1-100 picometres

2. Which property of nanoparticles is mostly responsible for their different properties compared to the same bulk material?

a) Their density
b) their melting and boiling points
c) Their incredibly small size
d) Their very large surface area to volume ratio

3. In self-cleaning ovens how do nanoparticles help remove food residues?

a) Through catalytic neutralisation
b) Through catalytic oxidation
c) Through catalytic decomposition
d) Through catalytic reduction

4. In water treatment the titanium dioxide nanoparticles are activated by light, this produces reactive oxygen free radicals which help break down pollutants.

5. Buckyballs consist of football like structures which consist mainly of a series of 5-sided and 6-sided linked together.

6. Catalytic converters in cars commonly use nanoparticles made from which of the following?

a) Aluminium and silicon
b) iron and nickel
c) Platinum and palladium
d) Copper and zinc

7. Why are nanoparticles used in sun creams?

a) To make the sun cream thicker and easier to apply
b) To add a chalky residue to enable you to see which areas the sun cream has been applied to
c) To make the sun cream smell better
d) To be transparent on the skin but still block UV rays

8. Silver nanoparticles are used in some deodorants due to their:

a) Fragrant smell and odour
b) Ability to reduce sweat production
c) Antimicrobial properties
d) Ability to moisturise the skin

9. Buckyballs used in medical research are made from atoms of arranged in football like structures..

10. What is a key advantage of using buckyballs in drug delivery inside the human body?

a) They decrease unwanted side-effects of the drugs
b) The drug molecules can be targeted to specific cells such as cancer cells
c) They make the drugs less effective
d) They are easily broken down by the immune system