Pressure Moment
Medway LEA Advisory Service
Speeding up/pressure and moments
9K & 9L
27 min
27 marks
Q1-L3, Q2-L4, Q3-L4, Q4-L5, Q5-L6
1. (a) E D A B C 1 all five letters must be in the correct order
(b) to measure volume accept ‘to make sure they used the same 1 volume of water in each beaker’ accept ‘to measure amount of water’ accept ‘to measure the volume of salt or sugar’ ‘to measure salt or sugar’ is insufficient
(c) any one from 1 • they used the same volume of accept ‘they used the same amount of water water’ accept ‘they stirred the same number of times’ accept ‘they stirred at the same speed’ accept ‘they stirred for the same time’ ‘they stirred it’ is insufficient
(d) (i) any one from 1 • you might not get the same accept ‘you might not get the same amount mass each time of salt or sugar’ • you will not know how accept ‘it is not precise or a much was added measurement’ accept answers which suggest that using a spatula is not a precise measurement
(ii) any one from 1 • measure the mass accept ‘measure weight’ or ‘weigh it’ accept ‘use a balance or scales’ • measure the number of accept ‘use grams’ grams accept ‘use a measuring cylinder’ accept ‘level it with a knife’
(e) from 1–31 inclusive 1
[6]
2. (a) any one from 1 • it describes how they will carry accept a description which identifies a out their investigation factor to be kept constant • it has more information or detail accept ‘the second plan includes apparatus
Speeding up/pressure and moments
9K & 9L
27 min
27 marks
Q1-L3, Q2-L4, Q3-L4, Q4-L5, Q5-L6
1. (a) E D A B C 1 all five letters must be in the correct order
(b) to measure volume accept ‘to make sure they used the same 1 volume of water in each beaker’ accept ‘to measure amount of water’ accept ‘to measure the volume of salt or sugar’ ‘to measure salt or sugar’ is insufficient
(c) any one from 1 • they used the same volume of accept ‘they used the same amount of water water’ accept ‘they stirred the same number of times’ accept ‘they stirred at the same speed’ accept ‘they stirred for the same time’ ‘they stirred it’ is insufficient
(d) (i) any one from 1 • you might not get the same accept ‘you might not get the same amount mass each time of salt or sugar’ • you will not know how accept ‘it is not precise or a much was added measurement’ accept answers which suggest that using a spatula is not a precise measurement
(ii) any one from 1 • measure the mass accept ‘measure weight’ or ‘weigh it’ accept ‘use a balance or scales’ • measure the number of accept ‘use grams’ grams accept ‘use a measuring cylinder’ accept ‘level it with a knife’
(e) from 1–31 inclusive 1
[6]
2. (a) any one from 1 • it describes how they will carry accept a description which identifies a out their investigation factor to be kept constant • it has more information or detail accept ‘the second plan includes apparatus