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UK GCSE 2010 : Physics Foundation Tier, Paper 1

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Centre Number 71 Candidate Number General Certificate of Secondary Education 2010 Paper 1 Foundation Tier G7602 Science: Physics [G7602] FRIDAY 28 MAY, MORNING TIME 1 hour 15 minutes. 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 five questions. INFORMATION FOR CANDIDATES The total mark for this paper is 100. Quality of written communication will be assessed in question 1(c)(iv). Figures in brackets printed down the right-hand side of pages indicate the marks awarded to each question or part question. Details of calculations should be shown. Units must be stated with numerical answers where appropriate. For Examiner s use only Question Number 1 2 3 4 5 Total Marks 5356 Marks 1 (a) John sets up the apparatus shown below. He uses it to discover how the length of the spring changes as he increases the force stretching it. He changes this force by adding 100 g masses to a length of string attached to the spring. Examiner Only Marks Remark Pulley Spring 100 g masses (i) What is the force provided by attaching a 100 g mass to the string? Force = ____________ N [2] The graph below shows some of John s results. 500 400 Length of the spring in mm 300 200 100 0 200 400 600 800 1000 Mass attached to the spring in g 5356 2 [Turn over (ii) Use the graph to find the unstretched length of the spring. Examiner Only Marks Remark ____________ mm [1] (iii) Use the graph to find the extension of the spring for each 100 g mass added. Extension for each 100 g mass = ____________ mm [1] (iv) The 100 g masses are removed and replaced by an object. The length of spring is then measured as 250 mm. Use the graph to read off the mass of this object. Mass = ____________ g [2] (v) State Hooke s law. _____________________________________________________ _____________________________________________________ ___________________________________________________ [2] (vi) John discovers that the spring obeys Hooke s law for masses up to a maximum of 800 g. On the grid, continue the graph to show its shape up to 800 g and from 800 g to 1000 g. [2] 5356 3 [Turn over (b) The diagram below shows a space rocket and two of the forces acting on it a short time after its launch. Examiner Only Marks Remark Thrust provided by the rocket engine Downward force (i) What provides the downward force on the rocket? ___________________________________________________ [1] (ii) The upward thrust force is greater than the downward force. Tick ( ) the statement below which best describes the upward motion of the rocket. The rocket is slowing down. The rocket is moving with constant speed. The rocket is speeding up. 5356 [1] 4 [Turn over (c) Rockets of this type are used to place satellites in orbit around the Earth. Examiner Only Marks Remark (i) On the diagram below, draw an arrow to show the direction of the centripetal force acting on the satellite that is orbiting the Earth. Make sure you label this arrow F. [1] (ii) What provides this centripetal force? ___________________________________________________ [1] (iii) On the diagram above, draw an arrow to show the direction of the [1] satellite s velocity. Make sure you label this arrow V. (iv) Explain why a satellite s velocity is different from its speed. _____________________________________________________ ___________________________________________________ [1] Quality of written communication [1] (v) This satellite takes 1.5 hours to complete one orbit. The distance it travels in one orbit is 40 000 km. Calculate its average speed in kilometres per hour. Speed = ______________ km/h [3] 5356 5 [Turn over 2 (a) The use of wind turbines is on the increase. Examiner Only Marks Remark (i) Complete the boxes below naming the main energy changes taking place in a wind turbine. Energy in the wind Energy in the moving rotor blades Output energy from the turbine [3] (ii) Name two unwanted forms of energy that result from the use of wind turbines. 1. ______________________ 2. ______________________ [2] (iii) Apart from environmental concerns, what is the main disadvantage of wind turbines compared with the use of fossil fuels? _____________________________________________________ ___________________________________________________ [1] (iv) The efficiency of a wind turbine is 0.3 (30%). Explain carefully what this means. _____________________________________________________ _____________________________________________________ ___________________________________________________ [2] 5356 6 [Turn over (b) Global warming is seen by many as a major threat to many countries and peoples. Examiner Only Marks Remark (i) What human activity is seen as a major contributor to global warming? _____________________________________________________ Describe briefly how it contributes to global warming. _____________________________________________________ ___________________________________________________ [2] (ii) Nuclear power is seen by some as a solution to the problem of global warming. Explain briefly why this is. _____________________________________________________ _____________________________________________________ ___________________________________________________ [1] (iii) Why is the waste resulting from the use of nuclear power considered to be dangerous? ___________________________________________________ [1] (iv) What element is used as the fuel in nuclear power stations? ___________________________________________________ [1] (v) Nuclear power is a non-renewable source of energy. Explain why it is described in this way. _____________________________________________________ _____________________________________________________ ___________________________________________________ [1] 5356 7 [Turn over (c) The diagrams show a cardboard rectangle and circle. Examiner Only Marks Remark (i) Label the centre of mass (centre of gravity) of each with an X. [2] Clare is given a piece of cardboard with an irregular shape as shown below. She suspends the cardboard from a retort stand using a pin so that it can swing freely. When it comes to rest she hangs a plumbline (a length of string with a weight attached) from the pin as shown in the diagram. (ii) Mark on the diagram where you think the centre of mass of the cardboard might be. Use an X. [1] (iii) Describe what Clare needs to do to find accurately the position of the centre of mass of the cardboard. _____________________________________________________ _____________________________________________________ ___________________________________________________ [3] 5356 8 [Turn over 3 (a) The electromagnetic spectrum is a set of transverse waves. Three members of the electromagnetic spectrum are shown below. (i) Write the names of the other four members of the electromagnetic spectrum in the appropriate boxes. Increasing wavelength Gamma rays Visible light Microwaves Examiner Only [4] Marks Remark (ii) State a property unique to electromagnetic waves. ___________________________________________________ [1] (b) Which member of the electromagnetic spectrum is used: (i) to sterilize medical instruments ___________________________ (ii) to heat food quickly ____________________________________ (iii) in sunbeds to give a tan? _______________________________ [3] (c) (i) Explain what a luminous object is. ___________________________________________________ [1] (ii) Give an example of a luminous object. ___________________________________________________ [1] (iii) Explain what a non-luminous object is. ___________________________________________________ [1] (iv) Give an example of a non-luminous object. ___________________________________________________ [1] 5356 9 [Turn over (d) The incomplete ray diagram below shows the image I of a lamp O, in a plane mirror M. Examiner Only Marks Remark M O I A B Draw on the diagram; (i) the normals at points A and B. (ii) the corresponding incident rays. [1] (iii) arrows to show the direction of the incident rays. 5356 [1] [1] 10 [Turn over (e) Two plane mirrors, M1 and M2 are inclined at 50 to each other as shown in the diagram below. A ray of light strikes M1, so that the angle between the mirror and the ray is 40 . Examiner Only Marks Remark Mirror M2 40 50 Mirror M1 (i) Calculate the angle of incidence at M1. Angle of incidence at M1 = ______________ [1] (ii) State the angle of reflection at M1. Angle of reflection at M1 = ______________ [1] (iii) Calculate the angle of incidence at M2. Angle of incidence at M2 = ______________ [2] (iv) Draw on the diagram an arrow to show the path of the reflected ray from M2. [1] 5356 11 [Turn over 4 (a) Atoms contain electric charges. Examiner Only Marks Remark (i) Explain how an atom can be neutral. _____________________________________________________ ___________________________________________________ [1] A cloth is rubbed on a plastic rod. This makes electrons move from the cloth to the rod. Cloth Plastic rod (ii) What kind of electric charge does an electron have? ___________________________________________________ [1] (iii) What effect does the movement of the electrons have on the charge of the cloth and the charge of the plastic rod? _____________________________________________________ _____________________________________________________ _____________________________________________________ ___________________________________________________ [2] 5356 12 [Turn over (b) (i) Name the instrument used to measure the electric current in a circuit. Examiner Only Marks Remark ___________________________________________________ [1] (ii) What is the unit of electric current? ___________________________________________________ [1] The current can be changed in the circuit shown below. (iii) How will it be possible to know whether the current is being increased or decreased or staying the same in this circuit? _____________________________________________________ _____________________________________________________ ___________________________________________________ [2] On the diagram above mark the following. (iv) The positive terminal of the battery, using a + sign. (v) The direction of electron flow in this circuit, using an arrow. 5356 [1] [1] 13 [Turn over (c) Two lamps are connected as shown below. Examiner Only Marks X Remark Y (i) What name is given to the way the lamps are connected in this circuit? ___________________________________________________ [1] When the switch is closed, the current flowing in bulb Y is 0.25 A. (ii) Is the current flowing through the switch smaller than, equal to or greater than 0.25 A? ___________________________________________________ [1] (d) The circuit shown in the diagram below is set up. A S B C (i) On the circuit diagram, using the correct symbol, show how a voltmeter should be connected to measure the voltage across lamp A. [1] 5356 14 [Turn over When the switch is closed, it is found that the current flowing in lamp A is 0.2 A and the current flowing in lamp B is 0.15 A. Examiner Only Marks Remark (ii) What is the current flowing through the switch S? You are advised to show clearly how you get your answer. Current = ___________ A [1] Lamps B and C are identical. The voltage across lamp B is 1.4 V. (iii) What is the voltage across lamp C? Voltage = ___________ V [1] (iv) What is the voltage across lamp A? You are advised to show clearly how you get your answer. Voltage = ___________ V [2] (v) What is the resistance of lamp A? You are advised to show clearly how you get your answer. Resistance = ___________ [3] 5356 15 [Turn over BLANK PAGE 5356 16 [Turn over 5 (a) (i) Name the three particles that make up an atom. Examiner Only Marks Remark _______________________ _______________________ _______________________ [3] (ii) Name the particles that are together in the nucleus of an atom. _______________________ _______________________ [1] A nucleus has an atomic number 3 and mass number 7. (iii) What does this tell you about the particles that make up the nucleus? _____________________________________________________ ___________________________________________________ [2] (b) (i) What is a beta particle? ___________________________________________________ [1] (ii) What part of the atom emits a beta particle? ___________________________________________________ [1] (iii) Name the two other radiations that can be emitted by a radioactive substance. ___________________________________________________ [2] (iv) A sheet of paper can stop one of these three radiations. Which one? ___________________________________________________ [1] 5356 17 [Turn over (c) A beta-emitting radioactive source is placed 5 cm from a detector, as shown in the diagram below. The radioactive source is surrounded by a substance X on all sides, except for a narrow opening on the right. Examiner Only Marks Remark 5 cm X Detector Radioactive source (i) Name the substance X surrounding the source. ___________________________________________________ [1] (ii) Give two reasons why the substance X is used in this way. 1. ___________________________________________________ _____________________________________________________ 2. ___________________________________________________ ___________________________________________________ [2] (iii) Give one reason why even a weak radioactive source should be handled using tongs. _____________________________________________________ ___________________________________________________ [1] 5356 18 [Turn over You are provided with a number of aluminium squares, each 1 mm thick. Examiner Only Marks Remark (iv) Describe, briefly, how you would use the equipment shown opposite and the aluminium squares, to measure the range of the beta particles in aluminium. _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ ___________________________________________________ [5] THIS IS THE END OF THE QUESTION PAPER 5356 19 [Turn over 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. 1847-019-1

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