d i What is the National Grid Tick one box A system of cables and pylons A

D i what is the national grid tick one box a system

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1 (d) (i) What is the National Grid?
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(04) G/T95890/Jun13/PH1HP 2 The picture shows a person taking a hot shower. Mirror 2 (a) When a person uses the shower the mirror gets misty. Why? ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (3 marks)
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5 Do not write outside the box (05) G/T95890/Jun13/PH1HP Turn over 2 (b) The homeowner installs an electrically heated mirror into the shower room. When a person has a shower, the heated mirror does not become misty but stays clear. Why does the mirror stay clear? ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks) ____ 5 Turn over for the next question
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6 Do not write outside the box (06) G/T95890/Jun13/PH1HP 3 (a) Light waves transfer energy. 3 (a) (i) Complete the following sentence. The oscillations producing a light wave are .................................................................. to the direction of the energy transfer by the light wave. (1 mark) 3 (a) (ii) The apparatus in the diagram shows that light waves transfer energy. Desk lamp On/off switch Solar panel Electric motor Fan blades Describe how switching the desk lamp on and off shows that light waves transfer energy. You do not need to describe the energy transfers. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks)
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7 Do not write outside the box (07) G/T95890/Jun13/PH1HP Turn over 3 (b) A student holds a wrist watch in front of a plane mirror. The student can see an image of the wrist watch in the mirror. The diagram shows the position of the wrist watch and the mirror. Plane mirror Wrist watch Draw a ray diagram showing how the image of the wrist watch is formed. Mark the position of the image. (4 marks) 3 (c) The image of the wrist watch seen by the student is virtual. What is a virtual image? ............................................................................................................................................ ............................................................................................................................................ (1 mark) ____ 8 Turn over for the next question
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8 Do not write outside the box (08) G/T95890/Jun13/PH1HP 4 (a) In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate. The diagram shows the structure of a vacuum flask. Silvered surfaces Vacuum Hot liquid Double-walled glass container Plastic cap A vacuum flask is designed to reduce the rate of energy transfer by heating processes. Describe how the design of a vacuum flask keeps the liquid inside hot. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................
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9 Do not write outside the box (09) G/T95890/Jun13/PH1HP Turn over ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (6 marks) 4 (b) Arctic foxes live in a very cold environment. Arctic foxes have small ears. How does the size of the ears help to keep the fox warm in a cold environment? ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks) ____ 8
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10 G/T95890/Jun13/PH1HP Do not write outside the box (10) There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED
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11 Do not write outside the box G/T95890/Jun13/PH1HP Turn over (11) 5 An electric immersion heater is used to heat the water in a domestic hot water tank.
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