What is nanoscience?
The study of structures that are between 1 and 100 nm in size
The study of structures that are between 10 and 1,000 nm in size
The study of structures that are between 1 and 1,000 nm in size
Which of these statements about nanoparticles is correct?
They have large volume to surface area ratios
They have large surface area to volume ratios
They have small surface area to volume ratios
A cube shaped nanoparticle has sides of 1 nm. What is its surface area?
1 nm2
4 nm2
6 nm2
A cube shaped nanoparticle has sides of 2 nm. What is its volume?
4 nm3
8 nm3
24 nm3
If the length of the side of a cube gets 10 times smaller, how does the surface area to volume ratio change?
It gets 10 times bigger
It gets 100 times bigger
It gets 100 times smaller
What is the surface area to volume ratio of a cube shaped nanoparticle with sides of 2 nm?
3
8
24
What is a bulk material?
A large amount of a nanoparticulate material
A material in the form of powder, lumps or sheets
A material in the form of nanoparticles
What is the range of diameters for dust particles?
1 to 100 nm
100 to 2,500 nm
2,500 to 10,000 nm
Why do some people prefer nanoparticulate zinc oxide in sunscreens, compared to bulk zinc oxide?
Nanoparticulate zinc oxide prevents ultraviolet radiation from reaching the skin, but bulk zinc oxide does not
Nanoparticulate zinc oxide is invisible on the skin, but bulk zinc oxide is white
Nanoparticulate zinc oxide is white on the skin, but bulk zinc oxide is invisible
Which of these particles has the largest diameter?
A nanoparticle
A small molecule
An atom