Fuel To know what a fuel is, and why fuels are used

What fuels can you see in this picture?

What is a fuel? Are some fuels better than others? Fuels are substances which release energy when they burn Some fuels are better than others e.g. one fuel may be easier to store, give off more heat or pollute less

Which biscuit do you think would be best to eat on sports day? 100g chedders100g Rich Tea100g Nice Biscuits 100g Digestive 100g Ryvita

SAT questions sometimes give you a blank box to plan your experiment. Martin and Jude would like to know which biscuit will give them more energy on sports day Use the box below to design an experiment they could use to investigate this question There is no right or wrong answer and this box is not marked!! What matters is how you answer the questions 1.What is your independent variable? (the variable you will change) 2.What is your dependent variable? (the variable you will measure) 3.What equipment will you need to measure this? 4.Name 2 things you will need to control (keep the same) to make this a fair test? 5.How will you make your results repeatable?

Key Stage 3 Risk Assessment HazardRiskMinimising Action Emergency Action Extra Info Use of Lab

Key Stage 3 Risk Assessment HazardRiskMinimising Action Emergency ActionExtra Info Use of Lab Tripping over stools/bags Stools under desk Bags under desk Ice on knocks Call first aider Bunsen BurnerBurnsSafety flame Put in middle of desk Run under cold water Call first aider Hot biscuitScoldingStand up during practical Run under cold water Call first aider ThermometerMercury Broken Glass Care when usingTell teacher Teacher clear up using mercury spill kit GlassCutsTake care with glass Teacher clear up Elevate cut Pressure Call first aider

Recording your Results Design a table to collect your results in This is usually the thing you change These are usually the things you have measured NEVER FORGET YOUR UNITS!!! (e.g. s, m, cm, N) Use a PENCIL and RULER

Record your results BiscuitTemperature change of water (°C)Average Temp change (°C) Test 1Test 2Test 3 Calculating the average Cross out anomalies (we will not use these in the average) (e.g. 84, 86, 102, 73) Add up the numbers you have left (e.g = 243) Divide your answer by the amount of numbers you have (e.g.243 ÷ 3 = 81)

Example class results BiscuitTemperature change of water (°C)Average Temp change (°C) Test 1Test 2Test 3 Cheddars89 Digestive78 Rich Tea5115 Nice66 Calculating the average Cross out anomalies (we will not use these in the average) (e.g. 84, 86, 102, 73) Add up the numbers you have left (e.g = 243) Divide your answer by the amount of numbers you have (e.g.243 ÷ 3 = 81)

What is in the biscuits? BiscuitEnergyProteincarbohydrateFat Nice2037kJ 485kcal 6.5g68g20.8g Cheddars2127kJ 509kcal 11.6g53.2g27.7g Digestive2040kJ 487kcal 6.9g62.8g23.1g Rich Tea1908kJ 453kcal 7.2g72.4g15g What makes one biscuit a better fuel than another?