sizes of particles and their uses - TRIPLE

Question 1

what is nanoscience?

Answer 1

the study of small particles that are between 1 -100 nanometres.

Question 2

what is a nanometre

Answer 2

(1nm) = 1x10-9m.

Question 3

what is a micrometre

Answer 3

(1um) is 1x10-6m

Question 4

what are the particles in the air known as?

Answer 4

eg pollutants and pollen are known as particulate matter
(PM).

Question 5

what type of diameter does Coarse particles ( often referred to as dust) have?

Answer 5

have diameters 10 times bigger than
particulate matter = PM10

Question 6

what is the diameter of fine particles?

Answer 6

0.1um (100nm or 1x10-7m) and 2.5um.

Question 7

what happens as a cube decreases its side by a factor of 10

Answer 7

its surface area to volume ratio
decreases by a factor of 10.

Question 8

Nanoparticles have a____ surface area to____ ratio and have different
_____than the same materials in____.

Answer 8

Nanoparticles have a high surface area to volume ratio and have different
properties than the same materials in bulk.

Question 9

when are smaller quantities of material needed?

Answer 9

when they are in nanoparticles to be as
effective as normal sized particles.

Question 10

what are the many applications of nanoparticles?

Answer 10

in medicines, electronics, cosmetics, sun
creams, deodorants and catalysts.