Module 1, Maths Skills

Question 1

Length unit and symbol

Answer 1

M, l

Question 2

Mass unit and symbol

Answer 2

Kg, m

Question 3

Time unit and symbol

Answer 3

S, t

Question 4

Amount unit and symbol

Answer 4

Mol, n

Question 5

Temp unit and symbol

Answer 5

K(kelvin), T

Question 6

Pressure unit and symbol

Answer 6

Pa(pascals), p

Question 7

Frequency unit and symbol

Answer 7

Hz/s-1, V

Question 8

Energy unit and symbol

Answer 8

J, E

Question 9

What is 0K(kelvin) equivalent to in degrees Celsius

Answer 9

-273 *C

Question 10

Kilo in standard form and symbol

Answer 10

10^3, K

Question 11

Deci in standard form and symbol

Answer 11

10^-1, d

Question 12

Centi in standard form and symbol

Answer 12

10^-2, C

Question 13

Milli in standard form and symbol

Answer 13

10^-3, m

Question 14

Micro in standard form and symbol

Answer 14

10^-6, u(backwards u)

Question 15

What is 3um(micro meter) in standard form

Answer 15

3x10^-6

Question 16

What is 1 tonne equivalent to in kg

Answer 16

1000

Question 17

How to convert units e.g 12cm to dm

Answer 17

X10^a-b, a=original prefix b=new prefix, a=10^-2 b=10^-1, (-2)-(-1)=x10^-1, 12x10^-1dm = 1.2dm

Question 18

Converting units in volume, e.g 4dm^3 into cm^3

Answer 18

Do not use ml, l typically, instead cm^3, dm^3. Follow power law (x^n)^m=x^nxm. 1dm^3= 1000cm^3. E.g 4dm^3= 4x(10^-1)^3=4x10^-3, cm^3= (10^-2)^3=10^-6. X10^-3- - 6= x10^3. 4x10^3 cm^3= 4000cm^3

Question 19

During multiplication and division how should answer be left if not specified

Answer 19

Least number of significant figures in data used

Question 20

During addition subtraction how should answer be left if not specified

Answer 20

Smallest decimal place in data

Question 21

What is m in standard form

Answer 21

10^0

Question 22

What is mega in standard form

Answer 22

10^6

Question 23

What is nm in standard form

Answer 23

10^-9

Question 24

What is uncertainty

Answer 24

Half the smaller increment the equipment can measure, in either direction

Question 25

Percentage error equation

Answer 25

Number of readings x uncertainty/measure value x100

Question 26

The lower the percentage error the….

Answer 26

More accurate

Question 27

How many readings for temp

Answer 27

1

Question 28

How many readings for temp change

Answer 28

2

Question 29

How many readings for pipette

Answer 29

1

Question 30

How many readings for a burette (titration)

Answer 30

2

Question 31

What is 1 litre in dm^3

Answer 31

1

Question 32

What is 1ml in cm^3

Answer 32

1

Question 33

How to reduce percentage error on a balance

Answer 33

Increase d.p

Question 34

How to reduce percentage uncertainty

Answer 34

Have a mass balance to higher d.p, larger/increase mass