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Edexcel | Physics 4PH0 | W 10 3 | Q1

W 10 3
1
(a)
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1 Mark

A student knows that some metals are better heat conductors than others.

He investigates rods made of aluminium, brass, copper, iron, lead and zinc.

The diagram shows the equipment which he uses to test three of the rods.

He fits the rods into corks and puts the corks into holes in the lid.

He covers each rod above its cork with wax which is solid at room temperature.

The student pours hot water into the tank and puts the lid on.

After 20 seconds, he measures the length of the melted wax on each rod.

Measure the length of melted wax above the cork in the following diagram.

Length = ........................... mm

 

44-45 (mm)

W 10 3
1
(b)
Add To Classified
1 Mark

Name the equipment the student needs to measure the time of 20 seconds.

 

stopwatch /stop clock / chronometer

/timer

 

W 10 3
1
(c) (I)
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2 Mark s

The rods are all the same length.

Give two other features of the rods and their arrangement which should be the

same to make a fair comparison.

Feature 1 ................................................................................................................

................................................................................................................................

Feature 2 ................................................................................................................

Acceptable Answers Extra Information

same length of rod in the water/air    

same thickness/radius/diameter / width 

 

allow ‘cork in the same

position (on rod)’ 

dna features that shoulbe constant e.g. same

water temperature,

time, wax 

 

 

W 10 3
1
(c) (II)
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2 Mark s

The student repeats the investigation for the other three rods.

Give two other features of this second investigation which should be the same as

those in the first to make a fair comparison of all six metals.

Do not list any feature already referred to in (c)(i).

Feature 1 ................................................................................................................

................................................................................................................................

Feature 2 ................................................................................................................

Acceptable Answers  Extra Information

ANY TWO 

• same (starting) temperature of

      the (hot) water  

• same room temperature

• same volume/mass of (hot)

water (in the tank)

• same time (20 s)

• same type of wax (same melting

point)

 

allow any feature(s)

not already given

credit 

allow ‘tank filled to the

same level’ 

dna allow ‘same amountof wax’ 

 

 

W 10 3
1
(d) (I)
Add To Classified
1 Mark

The student’s friend says that it is more reliable to take several readings rather than

just one.

This is correct because any anomalous (or unexpected) readings are then easier to

identify.

State how you can recognise an anomalous reading.

Acceptable Answers  Extra Information  

does not fit  the pattern 

(of the other results)  

 

 

allow ‘is not similar to

the other results’

 

 

 

W 10 3
1
(d) (II)
Add To Classified
1 Mark

State what you should do with an anomalous reading.

...............................................................................................................................

Acceptable Answers  Acceptable Answers 

ignore it/do not use it to calculate 

the average    

 

 

allow ‘repeat (that part 

of) the experiment’ 

 

 

 

W 10 3
1
(e) (I)
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3 Mark s

In a similar investigation a student collects the following data.

The teacher says that the student’s data should be drawn as a bar chart (histogram).

Use the student’s data to draw a bar chart.

 

Acceptable Answers  Extra Information  

axes both labelled with unit  

all data correctly transposed from the

table   

all columns the same width 

(up to and including 20 mm wide) 

 

allow vertical axis not

starting from zero 

 

 

W 10 3
1
(e) (II)
Add To Classified
1 Mark

Explain why a line graph is wrong for the student’s data.

..................................................................................................

 

ANY ONE 

• for a line graph both variables

should be continuous

• the names (of the metals are not

continuous they) are categoric

• only one quantity has a

value/number

• the points on the line (between

data points) are meaningless

• the slope (of the line(s))

is meaningless

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