Use of Appropriate Units

Question 1

How many micro metres are in 1mm? (how many um in 1mm?)

Answer 1

1000 um

Question 2

How many mm are in 1m?

Answer 2

1000mm

Question 3

A section of a quadrat measures 10x10cm. Calculate its area in:

cm^2
mm^2

Answer 3

cm^2 = 10x10 = 100cm^2

mm^2 = 10x10 = 100 x 100 = 10,000mm^2

Question 4

The volume of a cube is 1cm^3, calculate it in mm^3 and um^3

Answer 4

mm^3 =
1cm = 10mm 10 x 10 x 10 = 1000mm^3

um^3 =
10,000 x 10,000 x 10,000 = 1,000,000,000,00 um^3
OR 1.0 x 10^12

Question 5

What is rate?

Answer 5

quantity per unit time

Question 6

What is cm^3 s^-1 in words?

Answer 6

cm^3 per second

Question 7

What do you not use?

Answer 7

slash e.g. cm^3/s

Question 8

What is mol dm^-3 min^-1?

Answer 8

moles per dm^3 per min

Question 9

What is cm^3 g^-1 h-1 in words?

Answer 9

cm^3 per gram per hour

Question 10

60 seconds / Time of 1 cycle =

Answer 10

No cycles per time

Question 11

What is the symbol and factor for kilo?

Answer 11

k

10^3

Question 12

What is the symbol and factor for deci?

Answer 12

d

10^-1

Question 13

What is the symbol and factor for centi?

Answer 13

c

10^-2

Question 14

What is the symbol and factor for milli?

Answer 14

m

10^-3

Question 15

What is the symbol and factor for micro?

Answer 15

µ

10^-5

Question 16

What is the symbol and factor for nano?

Answer 16

n

10^-9

Question 17

What are the SI units for distance?

Answer 17

m, cm, mm, um, nm

Question 18

What are the SI units for Area?

Answer 18

m^2, cm^2, mm^2

Question 19

What are the SI units for volume?

Answer 19

dm^3, cm^3, mm^3

Question 20

What are the SI units for mass?

Answer 20

g, mg

Question 21

What is the SI units for time?

Answer 21

S, min, h

Question 22

What is the SI unit for temp?

Answer 22

^dot C