YEAR 9 (13+) SCHOLARSHIP February 2014 for entry in September 2014 SCIENCE FACULTY 2 Biology, Chemistry, Physics Your Name: _______________________________________________________ Your School: ______________________________________________________ Time allowed: 1 hour Total marks: 70 Equipment needed: Pen, pencil and ruler. You may use an eraser and a calculator if needed. Information for candidates: 1. Write your name and school on this page. 2. Write all of your answers on the question papers in the space provided. If you need additional paper then please ask the invigilator. 3. The marks for each question or part question are shown in square brackets [ ] after the question. 4. Answer ALL EIGHT QUESTIONS in SECTION A and ONE QUESTION ONLY from SECTION B.
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SCIENCE FACULTY 2 - Sevenoaks School: Home escape from an empty light socket when the switch was turned on. c) Explain why electricity does not escape from an empty light socket. ...
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YEAR 9 (13+) SCHOLARSHIP
February 2014 for entry in September 2014
SCIENCE FACULTY 2 Biology, Chemistry, Physics
Your Name: _______________________________________________________ Your School: ______________________________________________________
Time allowed: 1 hour Total marks: 70
Equipment needed: Pen, pencil and ruler. You may use an eraser and a calculator if needed.
Information for candidates: 1. Write your name and school on this page. 2. Write all of your answers on the question papers in the space provided. If you need additional paper then please ask the invigilator.
3. The marks for each question or part question are shown in square brackets [ ] after the question.
4. Answer ALL EIGHT QUESTIONS in SECTION A and ONE QUESTION ONLY from SECTION B.
SECTION A (Biology, Chemistry and Physics) ANSWER ALL EIGHT QUESTIONS IN THIS SECTION 1. The diagram below shows part of a food web in a wood (Figure 1.1).
5 Sparrowhawk 4 Blue tit 3 Ladybird Chiffchaff Carabid beetle 2 Aphid Winter moth larva Mottled umber moth larva 1 Oak tree
Figure 1.1
a) Name an example from the food web of:
(i) A producer ____________________________________________________ [1]
(ii) A secondary consumer __________________________________________ [1]
b) Write down a food chain, from the web, with at least four organisms including the blue tit. [2]
2. Some food companies have developed non-meat foods which look and taste similar to meat. One food called mycoprotein is produced from a fungus which is closely related to the mushroom. The table below compares some of the classes of food in beef and mycoprotein as percentages of their dry mass.
Class of food Beef
% dry mass Mycoprotein % dry mass
Protein 68.2 44.3 Lipid 30.2 13.8 Dietary fibre 0.0 37.6
a) Using the information in the table write down two differences between mycoprotein and beef which make mycoprotein a healthier food to eat. In each
c) Nigel carried out another experiment in which he added indigestion tablets to hydrochloric acid and collected the gas produced. He got the following results:
The indigestion tablets he used in this experiment were made of calcium carbonate.
(i) Write a word equation for the reaction that occurs.
b) The diagram below shows a ‘water circuit’, in which water is forced round by a pump. The rates of flow at two places are written on the diagram.
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(i) At what rate is water flowing:
into the pump? ………………………. cm3/s
out of the pump? …………………….. cm3/s [1]
(ii) The ‘water circuit’ can be used as a model of an electrical circuit. Each part of the ‘water circuit’ is equivalent to a part of an electrical circuit.
A family, who did not understand electricity very well, always made sure there was a bulb in each of the light fittings in their house. They were afraid that electricity would escape from an empty light socket when the switch was turned on.
c) Explain why electricity does not escape from an empty light socket.
________________________________________________________________________ [1] 7. a) An early type of echo sounder for a boat produces a sound of frequency 2000 Hz.
(i) The wavelength of this sound in water is 0.75 m. What is the speed of the sound in water? Give the unit.
(ii) This sound is heard by the operator as a brief ‘ping’. The speed of sound in air is 330 m/s. What is the wavelength of the sound in air? Give the unit.
SECTION B (Biology, Chemistry and Physics) ANSWER ONE QUESTION ONLY FROM SECTION B Either: 1. (Biology) or 2. (Chemistry) or 3. (Physics) 1. a) During the sexual reproduction in flowering plants, explain what is meant by
(i) the male gamete? _______________________________________________ [1]
(ii) the female gamete? ______________________________________________[1] (iii) the place where fertilisation occurs? _______________________________ [1]
c) After fertilisation, what happens to:
(i) the fertilised female gamete? _____________________________________ [1]
(ii) the ovule? ______________________________________________________[1]
(iii) the ovary? _____________________________________________________ [1]
d) Why is it important for the seeds produced by a flower to be dispersed away
2. a) Clara investigated differences between physical and chemical changes. She put three chemicals in separate crucibles and weighed each one. She heated each crucible as shown below.
She weighed each crucible again when it had cooled down. She recorded her observations and results in the tables shown below.
Experiment Chemical Observations
A Magnesium (silvery solid)
The silvery metal burned with a bright white light. A white solid was formed.
B Potassium
permanganate (purple crystals)
Purple crystals turned black. A colourless gas was given off.
C Zinc oxide (white powder)
The white powder turned pale yellow on heating. It turned white again on cooling.
Experiment Mass of
crucible / g Initial mass of crucible + contents / g
Final mass of crucible + contents / g
Change in mass during experiment / g
A 23.45 23.69 23.85 B 22.97 24.55 23.95 C 24.56 26.64 26.64 (i) Calculate the mass of magnesium heated in Experiment A. [1]
(iv) Rosie also did experiment A and got the following results.
Experiment Mass of
crucible / g Initial mass of crucible + contents / g
Final mass of crucible + contents / g
Change in mass during experiment / g
A 22.50 22.98 23.30
Rosie looked at Clara’s results and concluded that hers were the same. Comment on Rosie’s conclusion. __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ _______________________________________________________________ [2]
(v) The colourless gas given off in experiment B re-lighted a glowing splint. Identify this gas.
b) The metal chromium can be extracted industrially by three different chemical methods. The equations for these chemical reactions are shown below.
(i) Use the equations to compare the reactivity of chromium with the reactivities of aluminium, silicon and carbon. Tick one box in each column in the table.
[1]
(ii) In theory, the order of reactivity of aluminium, silicon and carbon can be obtained by heating each of the elements with the oxides of the other two. This suggests that it is possible to determine the order of reactivity by doing no more than three experiments.
State the two reactants you would heat together in each of the three experiments, and explain how you could use the results to determine the order of reactivity.
3. Jack and Jill are investigating terminal velocity. They have chosen to use muffin cases, shown here, as they have quite low terminal velocities in air. To alter the mass of the falling case they stack up to 7 cases together. Jack drops the stack of muffin cases from the top of a stairwell inside the science department. He drops them from above the second floor, and Jill times their fall from when they pass Jack’s feet to the floor. This is a distance of 4.8 m.
a) (i) Can you explain why Jack says “It is useful that the cases stack together so neatly”?
Their results are as follows: (the results for 5 cases were lost)
number of stacked muffin
average time of fall (s)
average terminal velocity (m/s)
1 4.36 1.10
2 3.00 1.60
3 2.52 1.90
4 2.18 2.20 5 6 1.78 2.70
7 1.60 3.00
The data of average terminal velocity against number of muffin cases is plotted on page 20.
b) (i) Using the plotted data, draw a line of best fit. [1]
(ii) Using the graph, complete the table of results with a prediction of the average terminal velocity for 5 cases, plus a calculated average time of fall for the 5 cases. [3]
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c) What would your conclusion be from Jack and Jill’s experiment?