2.6 Nanoscience

Question 1

What happens to atoms when they are arranged into very small particles?

Answer 1

They behave differently to ordinary materials made of the same atoms

Question 2

What is a consequence of nano particles having a very small size?

Answer 2

They have a very large surface area and new properties

Question 3

Name a technological use of nanotechnology and nano particles

Answer 3

•highly selective sensors

Question 4

Name a chemical use of nanoparticles and nanotechnology

Answer 4

•very efficient catalysts

Question 5

Name 2 everyday uses of nanoparticles and nanotechnology

Answer 5

• sun cream

* deodorant

Question 6

Name an industrial use of nanoparticles and nanotechnology

Answer 6

•to give construction materials special properties

Question 7

What are 2 worries of using nanoparticles in sun cream?

Answer 7

• if people where the cream before going in the sea and then the nanoparticles get into the sea, we don’t know what effect this will have on the sea
• no evidence showing its safe to use on people

Question 8

What will increasing use of nanoparticles increase the risk of?

Answer 8

The nanoparticles entering the air and our bodies which could have unpredictable consequences for our health and the environment

Question 9

Explain how a sun cream with nanoparticles could be better than one without

Answer 9

The nanoparticles in the sun cream have a coating of silica who’s thickness be adjusted at an atomic level so the coated nanoparticles are more effectively blocking sun rays

Question 10

What is nano science?

Answer 10

The study of small particles between 1 and 100 nanometers in size (1 billionth of a metre)