C1 and C2 revision

C1 and C2 revision

1. nanotechnology - nanoparticles are much smaller than normal particles (1-100m in size) or a few hundred atoms thick.

   • 1nm = 1*10-9m

2. nanoparticles - repels water, allows birds to navigate, allows gecko's to stick to trees, makes sunsets red BUT may be toxic, may enter the body causing harm because of how small they are and may risk food crops,

3. DNA - 2 nanometres across

4. nanoparticles have a huge surface area - which makes it very reactive.

5. nanoparticles have different properties to normal sized particles.