71
Candidate Number
General Certificate of Secondary Education
2013–2014
Science: Single Award
Foundation Tier
GSS21
Unit 2 (Chemistry)
[GSS21]
THURSDAY 15 MAY 2014, MORNING
TIME
1 hour.
INSTRUCTIONS TO CANDIDATES
Write your Centre Number and Candidate Number in the spaces provided at the top of this page.
Write your answers in the spaces provided in this question paper.
Answer all eleven questions.
For Examiner’s use only
Question
Marks
Number
1 2
INFORMATION FOR CANDIDATES
The total mark for this paper is 60.
Quality of written communication will be assessed in Question 10(a).
Figures in brackets printed down the right-hand side of pages indicate the marks awarded to each question or part question.
A Data Leaflet, which includes a Periodic Table of the Elements, is included in this question paper.
3 4 5 6 7 8 9
10
11
Total
Marks
9068
BLANK PAGE
9068
2
1
Given below are some hazard symbols and their names.
Examiner Only
Marks
Remark
(a) Using lines, match each symbol to its name. One has been done for you.
Name
Symbol
corrosive
explosive
flammable
radioactive
[2]
© Crown copyright
(b) What is the danger of a toxic substance?
9068
[1]
3
[Turn over
2
Shown below is a picture of a plug from a lamp.
Examiner Only
Marks
earth wire
fuse
cable © Martyn F. Chillmaid / Science Photo Library
(a) Complete the sentences below about the materials used. Choose from: conductor insulator
plastic
The wires in a plug are made from copper because it is
a good ___________________________ of electricity.
The cable to the plug is covered by the
material ___________________________.
9068
4
glass
[2]
Remark
A fuse is used to make the lamp safe. The metal wire in the fuse must melt if there is too much electricity.
Below is some information about metals which may be used.
Metal
Melting point/°C
Cost per gram/£
Platinum
1768
26.28
Tungsten
3422
3.41
Lead
327
0.98
Copper alloy
398
3.34
Examiner Only
Marks
Remark
(b) The wire must melt if the temperature reaches 330 °C. Which metal should the fuse wire be made from? Explain your answer.
9068
[2]
5
[Turn over
3
A student carried out an investigation to test the strength of five different fibres. The apparatus he used is shown below. clamp fibre being tested retort stand weights (a) The maximum weight each fibre could hold before breaking was measured and recorded below.
Fibre
Maximum weight/N
Nylon
20
Linen
11
Silk
8
Lycra
25
Cotton
10
(i) Name the fibre which is strongest.
[1]
(ii) Name the two synthetic (not natural) fibres that were tested.
and
[1]
(b) Using the information and your knowledge, suggest two reasons why synthetic fibres are replacing natural fibres for clothing.
1. 2.
9068
[2]
6
Examiner Only
Marks
Remark
4
Below are images of different fibres as seen under a microscope.
Examiner Only
Marks
nylon
wool
cotton
Remark
hair
© Science Photo Library
A scientist collected the fibre below from a crime scene.
(a) Using the images above, identify the fibre from the crime scene.
[1]
(b) Scientists can also collect fingerprint evidence from a crime scene.
(i) Suggest one reason why fingerprints usually provide better evidence than fibres.
[1]
(ii) Whorl and composite are two types of fingerprint. Name the other two main types. 1. 2.
9068
[2]
7
[Turn over
5
Fossils are often found in rocks. Layers of rock of a similar age contain similar types of fossils. The diagram below gives the age of some layers of rock and the fossils found in them.
Present day (surface)
A
Mammoth tooth
2 million years ago
© Dirk Wiersma / Science Photo Library
B
Snails
© Martin Bond / Science Photo Library
65 million years ago
C
Ammonites
© Natural History Museum, London / Science Photo Library
D
225 million years ago
Trilobites
© Sinclair Stammers / Science Photo Library
600 million years ago
(a) Which layer of rock, A, B, C or D is the oldest?
[1]
(b) A scientist found fossils of ammonites in a rock. What does this tell him about the age of this rock?
[1]
(c) Some trilobite fossils were found in rock on the surface of the Earth.
Suggest why this rock is now on the surface.
9068
[1]
8
Examiner Only
Marks
Remark
BLANK PAGE
(Questions continue overleaf)
9068
9
[Turn over
6
The pie chart below gives information about the composition of waste in a household bin.
garden
22.5%
other
23.0%
glass paper 20.0% plastic 10.0%
food
16.5%
(a) Calculate the percentage of waste which is glass.
(Show your working out.)
% [2]
(b) The Government is trying to encourage householders to cut down on waste by using the advertising campaign ‘reduce, reuse and recycle’. Using lines, match the following examples to the correct word.
Example
Word reduce use plastic bags more than once reuse use products with less packaging recycle [2]
9068
10
Examiner Only
Marks
Remark
(c) Glass is often recycled. Describe the steps in recycling waste glass after it has been delivered to the factory.
Examiner Only
Marks
Remark
[3]
(d) Use the information opposite to complete the bar chart below.
25
Composition of waste/%
20
15
10
5
0
plastic
food
paper
garden
other
glass
Type of waste
[2]
(e) Give two ways local authorities and councils are encouraging recycling. 1. 2.
9068
[2]
11
[Turn over
7
A student investigated the effect of heat on different metal carbonates.
The diagram below shows the apparatus she used.
metal carbonate being heated
Examiner Only
Marks
Remark
limewater
heat
After two minutes she stops heating the test tube and allows it to cool before measuring the mass of the metal carbonate.
The results are shown below.
Chemical
Mass before heating/g Mass after heating/g Colour before heating Colour after heating Effect on limewater copper carbonate 2.4
2.0
green
black
turns cloudy
manganese carbonate 2.6
2.1
pink
black
turns cloudy
sodium carbonate 2.5
2.5
white
white
none
zinc carbonate 2.7
2.1
white
white
turns cloudy
Examiner Only
(a) Name a piece of apparatus that could be used to measure the mass of the metal carbonates.
[1]
(b) Suggest why there is a loss in mass when copper carbonate is heated.
9068
[1]
12
Marks
Remark
(c) Name the metal carbonate that lost the most mass during this investigation. Examiner Only
Marks
Remark
[1]
(d) Which metal carbonate did not decompose when heated? Fully explain your answer.
9068
[3]
13
[Turn over
8
The diagram below shows an atom of an element.
Examiner Only
Marks
X
Key
X
Proton
X
Neutron
X
Electron
X
(a) Complete the diagram above by adding labels to the two boxes.
[2]
(b) What is the atomic number of this element? [1] (c) What is meant by the term mass number?
[1]
(d) To which group of the Periodic Table does this element belong? Explain your answer in terms of its electronic structure.
9068
[2]
14
Remark
(e) Oxygen has eight electrons. Complete the diagram below to show the electronic structure of oxygen.
Examiner Only
Marks
Remark
[1] (f) (i) Name the compound formed in the reaction between magnesium and oxygen.
[1]
(ii) What is the name given to this type of reaction?
9068
[1]
15
[Turn over
9
The table below shows the percentage of the most common elements found in the igneous rocks in the Earth’s crust.
Element
Percentage
Aluminium
8.1
Calcium
3.6
Iron
5.0
Magnesium
2.1
Oxygen
47.0
Phosphorus
0.1
Potassium
2.6
Silicon
28.0
Sodium
2.9
Titanium
0.6
Examiner Only
Marks
Use the information in the table and your knowledge to answer the following questions.
You may find your Data Leaflet helpful.
(a) Igneous rocks are only one type of rock. Name the other two types.
and
[2]
(b) Name the most common metal in the Earth’s crust.
[1]
(c) Calculate the total percentage of alkaline earth metals in the Earth’s crust. % [1]
9068
16
Remark
10 (a) Potassium and sodium are Group 1 metals. Compare their reactivity with water.
Your answer should include:
•
•
•
Examiner Only
Marks
Remark
two similarities between the reactions two differences between the reactions the products of one of the reactions
In this question you will be assessed on your written communication skills including the use of specialist scientific terms. [6]
(b) Francium is another Group 1 metal. Explain fully why it is not used in the school laboratory to demonstrate the reactions of Group 1 metals with water.
[2]
9068
17
[Turn over
11 Acid indigestion is caused by excess hydrochloric acid in the stomach.
It can be treated using antacid tablets which contain sodium hydrogencarbonate.
Examiner Only
Marks
© ZernLiew/iStock/Thinkstock
(a) Complete the word equation for the reaction between stomach acid and the antacid tablet.
sodium hydrogencarbonate
hydrochloric acid →
[3]
(b) Suggest one reason why antacid tablets do not contain sodium hydroxide. [1]
THIS IS THE END OF THE QUESTION PAPER
9068
18
Remark
Permission to reproduce all copyright material has been applied for.
In some cases, efforts to contact copyright holders may have been unsuccessful and CCEA will be happy to rectify any omissions of acknowledgement in future if notified.
113159
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