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YEAR 8: Energy

29/04/2012. 2. Index. lesson 1: Why does iced water change temperature if you leave it for for up to 30 minutes?lesson 2: Dealing with results and deciding what they mean.homework task 1lesson 3: Using your senses to decide on hot

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YEAR 8: Energy

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    1. YEAR 8: Energy Heating & Cooling

    2. 29/04/2012 2 Index

    3. 29/04/2012 3 Lesson 1

    4. Equipment Ice cubes (enough for 2 per group) Thermometers (2 per group) 250 cm³ beakers Timers Results tables Variables worksheet 29/04/2012 4

    5. 29/04/2012 5 Objectives: Work as a quality team. Record your results systematically. Be able to list the key variables. Why does iced water change temperature if you leave it for up to 30 minutes?

    6. 29/04/2012 6 Success in this lesson You will have bookwork that is clear and accurate. A complete set of accurate results. You will know that there are three types of variable.

    7. 29/04/2012 7 Variables

    8. Variables 29/04/2012 8

    9. 29/04/2012 9 Method

    10. Evaluation 29/04/2012 10

    11. 29/04/2012 11 Round-ups On WHITEBOARDS... Marks out of ten for your group Our group was a quality team! We recorded our results systematically. We all understand the three types of variable.

    12. 29/04/2012 12 Results

    13. Lesson 2 Checking that you understand variables. Dealing with the results and deciding what they mean.

    14. Equipment Handouts Graph paper 29/04/2012 14

    15. 29/04/2012 15 Objectives

    16. 29/04/2012 16 Success in this lesson.

    17. Variables 29/04/2012 17

    18. If you have used excel…

    19. 29/04/2012 19 Dealing with results

    20. 29/04/2012 20

    21. 29/04/2012 21 Homework task 1

    22. 29/04/2012 22 Success in this lesson.

    23. 29/04/2012 23 Assessment for Learning

    24. 29/04/2012 24 Evaluation

    25. Lesson 3 How warm is the water?

    26. 29/04/2012 26 Equipment list

    27. 29/04/2012 27 Objectives To learn that things feel hot or cold because of energy transfers. To learn to explain why things happen in terms of energy transfers.

    28. 29/04/2012 28 1. Which way does the energy transfer? Use mini whiteboards in pairs.

    29. 29/04/2012 29 2. Which way does the energy transfer? Use mini whiteboards in pairs.

    30. 29/04/2012 30

    31. 29/04/2012 31 Links

    32. 29/04/2012 32 Analysis: Work in pairs to copy and complete these statements.

    33. 29/04/2012 33 Plenary

    34. 29/04/2012 34 Homework task 2: Temperatures

    35. Evaluation 29/04/2012 35

    36. Lesson 4 How thermometers work

    37. 29/04/2012 37 Objectives To learn how a liquid thermometer works. To learn how energy transfer makes the thermometer work. To learn how to clearly explain why things happen in terms of energy transfer.

    38. 29/04/2012 38 Equipment

    39. 29/04/2012 39 What I am looking for… You can draw a clear diagram of what you did. You can describe what happened. You can explain how energy transfer made this happen.

    40. 29/04/2012 40 After the practical…

    41. 29/04/2012 41 Plenary: Fist of five…

    42. Lesson 5 ~ Part 1 Energy transfer from Bunsen to water.

    43. 29/04/2012 43 Objectives To learn that heat energy is not the same as temperature. To learn how to write predictions based on scientific understanding.

    44. 29/04/2012 44 What I am looking for… You are able to write a detailed prediction.

    45. 29/04/2012 45

    46. 29/04/2012 46 Which flask will receive the most energy? Why?

    47. 29/04/2012 47 Success? Fist of five… Your prediction clearly shows that you understand. You helped each other to understand.

    48. Lesson 5: Part 2 PRACTICAL

    49. 29/04/2012 49 Objectives & what I expect Revise safety rules. Learn to work efficiently as a team. Learn to select and use the correct equipment. You are able to work as a quality team. Safe, systematic & civilised! You can measure and record your results accurately. You can choose equipment and use it effectively.

    50. 29/04/2012 50 What do I mean? Safe Systematic Civilised

    51. 29/04/2012 51 Be safe!

    52. 29/04/2012 52 Round ups. How successful were you? You were able to choose your own equipment and use it safely. You worked as a quality team and got a good set of results.

    53. 29/04/2012 53 LESSON 5: Part 3 How can we be sure that both flasks received the same amount of energy?

    54. 29/04/2012 54 Objectives Learn how to calculate energy transfer. Write a level 5 explanation.

    55. 29/04/2012 55 Formula Energy = 4.2 x volume x temp rise

    56. 29/04/2012 56 How well did you do? With a bit of help, you were able to calculate how much energy transferred. You were able to explain the idea of the energy transfer. You were confidently able to calculate the energy transfer. You were able to explain why equal energy transfers made the temperature higher when there was less water.

    57. 29/04/2012 57 Homework task 3

    58. 29/04/2012 58 Assessment Get an assessment sheet from your teacher. Work in pairs and use the descriptions on the HEATING & COOLING mat to judge the level of your understanding. Look at the comments in your exercise book. Check your targets and update them. Hand in your assessment sheet.

    59. Lesson 6 What happens to the energy when hot and cold are mixed?

    60. 29/04/2012 60 Learning objectives and what I am expecting. Learn how thermal energy can spread out and what happens to the temperature. Measure volume and temperature accurately. Write a detailed explanation.

    61. 29/04/2012 61 Copy the diagram. Predict: What will the water temperature be when you pour both volumes of water into the empty beaker? Mixing the bath water

    62. 29/04/2012 62

    63. 29/04/2012 63 Round-ups Which beaker contained the most energy? If the start temperatures were 13 ºC and 59 ºC, what would the mixed temperature be? When you mixed, was any energy lost? What if I mixed 200 cm³ at 20 ºC with 100 cm³ at 40 ºC ?

    64. Explanation: Follow-up When the cold water and the hot water are mixed, the thermal energy in the how water passes into the cold water. This causes the hot water to cool down. The hot water is losing thermal energy. It also causes the cold water to warm up. The cold water is gaining thermal energy. 29/04/2012 64

    65. Explanation: Follow-up The final temperature will be somewhere between the temperature of the hot water and the temperature of the cold water. When we did the test, we expected the result to be 27 ½ °C because this is half-way between the two starting temperatures. However, the final result was 26 °C which is 1 ½ °C lower than expected. We think this was because some of the heat transferred into the cold glass of the beaker. 29/04/2012 65

    66. Heating & Cooling Lesson 7 Why do some materials feel cold?

    67. Equipment 8 sets A variety of materials to touch & hold Wool Stone Block of wood Balsa wood Rubber Glass Expanded polystyrene Metal sheet Marble 29/04/2012 67

    68. 29/04/2012 68 OBJECTIVES / OUTCOMES Learn that some materials conduct thermal energy well. Develop your ability to explain why things happen. Be able to decide which materials are good conductors of thermal energy. Be able to answer key questions with an explanation.

    69. 29/04/2012 69 Materials to test

    70. 29/04/2012 70 Explanation questions

    71. 29/04/2012 71 PLENARY: Scores out of 5 on mini whiteboards How well did your group work? How well has your ability to explain improved? How good was your pace of work?

    72. 29/04/2012 72 Homework task 4

    73. Heating & Cooling LESSON 8 Insulation

    74. 29/04/2012 74 OBJECTIVES / OUTCOMES Develop your investigation skills. Revise your knowledge of variables and controls to make your investigation scientific. Work as a team: safe, systematic and civilised. Produce a set of results that are obviously accurate. Use a graph to clearly show your results.

    75. 29/04/2012 75 Homework task 5

    76. 29/04/2012 76 End of unit Understanding the ideas of heat energy and energy transfer. Working as a team, being systematic and getting accurate results. Improving your ability to explain how and why things happen.

    77. ASSESSMENT End of unit 29/04/2012 77

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