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Explain why the copper pipes inside the solar panel are painted black.

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Presentation on theme: "Explain why the copper pipes inside the solar panel are painted black."— Presentation transcript:

1 Explain why the copper pipes inside the solar panel are painted black.
QWC P1 Travelcard Command word Question Value 2 marks Explain: All the points in your answer must be linked logically. Connectives: because, therefore, consequently, due to, since, this means, meaning that The picture shows one type of solar water heater. Water from the tank is slowly pumped through copper pipes inside the solar panel where the water is heated by energy from the Sun. Explain why the copper pipes inside the solar panel are painted black. Route Heat Transfers Valid within zones 1-3 @qegs_missward

2 QWC P1 Travelcard Command word Question Value Explain:
4 marks Explain: All the points in your answer must be linked logically. Connectives: because, therefore, consequently, due to, since, this means, meaning that Energy is transferred through the water by convection currents. Explain what happens to cause a convection current in the water. Route Heat Transfers Valid within zones 1-3 @qegs_missward

3 QWC P1 Travelcard Success criteria Marks Valid within zones 1-3 1
2 Black is a good absorber of radiation. therefore, more of the energy from the Sun is transferred into heating the water Route Heat Transfers Valid within zones 1-3 @qegs_missward

4 QWC P1 Travelcard Success criteria Marks Valid within zones 1-3 1
2 3 4 The water particles at the bottom gain energy and move faster The water particles move further apart/spread out The water becomes less dense Therefore the warmer water rises (above the cooler water) Route Heat Transfers Valid within zones 1-3 @qegs_missward

5 Explain why a liquid cools down when it evaporates
QWC P1 Travelcard Command word Question Value 5 marks Explain: All the points in your answer must be linked logically. Connectives: because, therefore, consequently, due to, since, this means, meaning that Explain why a liquid cools down when it evaporates Route Kinetic Theory Valid within zones 1-3 @qegs_missward

6 QWC P1 Travelcard Command word Question Value Explain:
4 marks Explain: All the points in your answer must be linked logically. Connectives: because, therefore, consequently, due to, since, this means, meaning that State two methods to reduce heat losses in the home. Explain how each method works. Route Home Insulation Valid within zones 1-3 @qegs_missward

7 QWC P1 Travelcard Success criteria Marks Valid within zones 1-3 1
2 3 4 5 There are forces of attraction between the molecules Only the fastest molecules have enough energy to overcome these forces As a result they are able to leave the surface of the liquid Consequently, the average energy of the remaining molecules decreases This means that the temperature of liquid is lowered. Route Kinetic Theory Valid within zones 1-3 @qegs_missward

8 QWC P1 Travelcard Science points Success criteria
Double glazing reduces heat loss via conduction and convection as there are no particles in the vacuum between the glass panels. Fibre glass to insulate the loft. Heat loss via convection prevented as fibres trap air and stop convection currents. Draught excluders around windows and doors. Prevent heat loss by convection. Silver foil behind the radiators. Prevents heat loss by radiation as the radiation is reflected back into the room. Cavity wall insulation. Uses an insulator which creates air pockets. Prevents heat loss by convection and conduction. Any two methods with correct explanation. Route Home Insulation Valid within zones 1-3 @qegs_missward

9 Generating Electricity
QWC P1 Travelcard Command word Question Value 6 marks Compare: Recall facts; more than a list but not a detailed description. Connectives: better, more than, less than, quicker, more expensive, on the other hand. Water in a tank could be heated by using an electric immersion heater or solar energy. Compare the advantages and disadvantages of using solar energy to heat the water rather than using an electric immersion heater Route Generating Electricity Valid within zones 1-3 @qegs_missward

10 Generating Electricity
QWC P1 Travelcard Command word Question Value 5 marks Evaluate: Consider evidence for and against. Give a justified conclusion that focusses on one point in more detail. Connectives : Whereas, unlike, equally, unless, however Wind turbines can be used instead of power stations to generate electricity. Evaluate the use of wind turbines for generating electricity. Route Generating Electricity Valid within zones 1-3 @qegs_missward

11 Generating Electricity
QWC P1 Travelcard Mark band Success criteria Science points Brief description of advantages and disadvantages of using solar energy rather than electric immersion heater, including either advantages or disadvantages. Weak SPaG. Weak or no conclusion. Poor organisation. Description of some of the advantages and disadvantages with at least one advantage and disadvantage from the list. Some SPaG errors. Clear, balanced and detailed description of advantges and disadvantages with at least two advantages and two disadvantages. Almost faultless SPaG. Advantages: a renewable energy resource, energy is free, does not pollute the atmosphere, no fuel is burnt, energy can be stored (in the water). Disadvantages: only available in daylight hours, availability fluctuates, insufficient hours of sunlight in some countries, average low intensity in some countries. . 1-2 3-4 5-6 Route Generating Electricity Valid within zones 1-3 @qegs_missward

12 Generating Electricity
QWC P1 Travelcard Mark band Success criteria 1 2 3 4 5 Wind power is a renewable source of energy which will never be used up whereas fossil fuels are non-renewable. There are no waste gases from wind turbines, whereas burning fossil fuels releases carbon dioxide, which is a greenhouse gas. However they do make a noise which some people living near to them object to Wind is unreliable; the turbines do not generate electricity when the wind is not blowing. Conclusion with a valid reason Route Generating Electricity Valid within zones 1-3 @qegs_missward

13 QWC P1 Travelcard Command word Question Value Explain:
4 marks Explain: All the points in your answer must be linked logically. Connectives: because, therefore, consequently, due to, since, this means, meaning that Name the two types of transformer that form part of the National Grid and explain their importance Route Heat Transfers Valid within zones 1-3 @qegs_missward

14 Electromagnetic Spectrum
QWC P1 Travelcard Command word Question Value 6 marks Explain: All the points in your answer must be linked logically. Connectives: because, therefore, consequently, due to, since, this means, meaning that Explain why mobile phone coverage can, in many parts of the country, be more unreliable than radio reception. Route Electromagnetic Spectrum Valid within zones 1-3 @qegs_missward

15 Generating Electricity
QWC P1 Travelcard Mark band Success criteria 1 2 3 4 The step up transformer increases the voltage (p.d.) and reduces the current through the transmission cables Less energy is wasted in the form of heat so the transfer is more efficient. The step down transformer decreases the voltage to 230V which is a safe working value for customers. Route Generating Electricity Valid within zones 1-3 @qegs_missward

16 Electromagnetic Spectrum
QWC P1 Travelcard Mark band Success criteria 1-2 3-4 5-6 Answer includes an incomplete description of relevant properties which may be linked to specific EM waves. Poor organisation and poor SPAG. A limited description of relevant properties of radio, micro, IR and visible light. Some communication uses are stated, but not always linked to the properties. Some SPAG errors. Detailed description of relevant properties of radio, micro, IR and visible light (speed, diffraction, absorption within atmosphere). Communication use of wave is linked to properties (microwaves pass through ionosphere, so are used for satellite communication etc). Well organised with almost faultless SPAG. Route Electromagnetic Spectrum Valid within zones 1-3 @qegs_missward

17 Describe the evidence that supports the Big Bang Theory.
QWC P1 Travelcard Command word Question Value 6 marks Describe: Recall some facts, events or processes in an accurate and ordered way. Connectives: Firstly, finally, next Describe the evidence that supports the Big Bang Theory. Route Big Bang Theory Valid within zones 1-3 @qegs_missward

18 QWC P1 Travelcard Command word Question Value Describe:
6 marks Describe: Recall some facts, events or processes in an accurate and ordered way. Connectives: Firstly, finally, next To be written… Route Big Bang Theory Valid within zones 1-3 @qegs_missward

19 Generating Electricity
QWC P1 Travelcard Mark band Success criteria Science points 1-2 3-4 5-6 Brief description of at least one way in which CMBR or red-shift provide evidence for the Big Bang. Weak SPAG. Poor organisation. A description of how red-shift and CMBR provide evidence for the Big Bang. Some SPAG errors. Some structure and organisation. Clear, balanced and detailed description of CMBR and red-shift and how both provide evidence for the Big Bang . Almost faultless SPAG. Coherent and organised logical sequence. CMBR: microwave radiation created shortly after the Big Bang. Coming from all directions with equal intensity. Light from distant galaxies is red-shifted. The further away the galaxy, the greater the redshift. The furthest galaxies are moving fastest. This shows the Universe is expanding and that it must have started from the same point. . Route Generating Electricity Valid within zones 1-3 @qegs_missward

20 QWC P1 Travelcard Success criteria Mark band Valid within zones 1-3 1
2 3 4 5 Wind power is a renewable source of energy which will never be used up whereas fossil fuels are non-renewable. There are no waste gases from wind turbines, whereas burning fossil fuels releases carbon dioxide, which is a greenhouse gas. However they do make a noise which some people living near to them object to Wind is unreliable; the turbines do not generate electricity when the wind is not blowing. Conclusion with a valid reason Route Big Bang Theory Valid within zones 1-3 @qegs_missward

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