nanotechnology.

Question 1

The use and control of tiny matter is called nanotechnology.

Answer 1

The use and control of tiny matter is called nanotechnology. The tiny matter is referred to as nanoparticles.

Question 2

What is the tiny matter referred to called?

Answer 2

nanoparticles.

Question 3

How are these particles are measured?

Answer 3

These particles are measured in nanometres (nm).

Question 4

A nanometre is one …… of a metre (0.000 000 001m).

Answer 4

nanometre is one billionth of a metre (0.000 000 001m).

Some of these nanoparticles occur naturally, for example in volcanic ash. Some occur by accident, for example during the combustion of fuels. Many occur by design.

Question 5

Nanotechnology is concerned with the use and control of structures that are… nanometres in size.

Answer 5

Nanotechnology is concerned with the use and control of structures that are 1-100 nanometres in size.

Question 6

Nanoparticles of a material show different properties compared to larger particles of the same material. Forces of attraction between surfaces can appear to be weak on a larger scale, but on a nanoscale they are …… WHy is this?

Answer 6

strong…One reason for this is the surface area to volume ratio. In nanoparticles this is very large. Atoms on the surface of a material are often more reactive than those in the centre, so a larger surface area means the material is more reactive.

Question 7

Is the surface area to volume ratio on a nanoparticles small or large?

Answer 7

Large

Question 8

Name3 Uses of nanoparticles

Answer 8

Nanoparticles are used in products that are currently available.
sports equipment:
clothing: silver nanoparticles have been added to socks. (This stops them from absorbing the smell of sweaty feet )
healthcare: nanoparticles are used in sunscreens.

Question 9

What are the concerns about nanoparticles?

Answer 9

There are some concerns that nano particles may be toxic