WorksheetsNanoparticles
Total questions: 10
Worksheet time: 8mins
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
To calculate the surface area of a cube, which formula is used?
Length x width x height
Length x width x 6
The surface area of this cube would be calculated as:
3 x 3 x 6 = (a) Inches2.
Calculate the surface area of this cube (sides: 5cm).
Answer = (a) cm2.
To calculate the volume of a cube, which formula is used?
Length x width x height
Length x width x 6
The volume of this cube would be calculated as:
3 x 3 x 3 = (a) Inches3.
Calculate the volume of this cube (sides: 5cm).
Answer = (a) cm3.
The surface area to volume ratio of this cube is therefore 54:27. What is the simplest version of this ratio?
54:27
2:1
5:2
3:1
Select all the uses of nanoparticles below.
Catalysts
Suncreams
Cosmetics
Sock deodorizers
Which is a concern over the use of nanoparticles in suncreams?
Zinc Oxide nanoparticles block UV light from reaching the skin.
Zinc Oxide nanoparticles are invisible.
They could pass through the skin into the body and have harmful effects.
