Density Marking scheme

- Mark Scheme /


Question Answer Marks AO Element Notes Guidance

1(a) (1100 – 400 =) 700 (g) 1

1(b) density = mass ÷ volume OR 3
ρ = m ÷ V in any form (1)
(ρ =) 700 ÷ 750 (1)
3
(ρ =) 0.93 (g / cm ) (1)

2 measuring cylinder partially filled 4
with water (1)
coil submerged in water (owtte)
(1)
new volume noted (1)
volume of wire = difference or
increase in volume(s) (1)

3(a) (678 – 318 = ) 360 (g) 1

3
3(b)(i) 160 (cm ) 1

3
3(b)(ii) 400 (cm ) 1

3(b)(iii) D = m / v in any form (1) 3
360 ÷ 400 (1)
3
0.9 (g / cm ) (1)

, - Mark Scheme /


Question Answer Marks AO Element Notes Guidance

4 density = mass ÷ volume OR 3
ρ = in any form (1)

( ρ =) 148 ÷ 16.6 (1)
3
( ρ =) 8.9 (g / cm ) (1)

5(a) density = mass ÷ volume in any 3
form OR
(mass =) density × volume (1)
mass = 1000 × 0.05 (1)
50 (kg) (1)

5(b) statement: (floats /does not 2 no marks for the
sink) statement alone
explanation:
density of full barrel / its density
/ density of plastic / density of
barrel / density of (pure) water
is less than sea water (1)
density of plastic / barrel AND
(pure) water is less than sea
water (1)