Presentation on theme: "22:09 CKS3: Yr7 Chemistry Unit 1 – Me the the Scientist! Lesson number: 1. Lesson Title: Using the bunsen burner. Learning OutcomesHow I didTargets Learning."— Presentation transcript:
22:09 CKS3: Yr7 Chemistry Unit 1 – Me the the Scientist! Lesson number: 1. Lesson Title: Using the bunsen burner. Learning OutcomesHow I didTargets Learning Outcome 1: To be able to use a bunsen burner safely. Level 5 Learning Outcome 2: To carry out an experiment to investigate the heating effect of different bunsen flames. Level 6 Extension activity: Using a bunsen burner for flame tests. Connector: Using the work sheet identify the safety hazards in the picture – there are at least 17! Record your answers in a table. Cro2011
New Information for Task 1
22:09 BIG picture What skills will you be developing this lesson? HSW- by carrying out an investigation/ Interpreting data/ evaluating an experiment Literacy- by writing explanations using correctly spelt keywords and by writing an instruction sheet Numeracy- by plotting a graph Team work- during a practical investigation Creative thinking- by considering how to work safely in a laboratory Participation- during a practical activity Reflection- through self and peer assessment of each outcome Key Question: How do you safely heat substances in a laboratory? Quick Discussion: What do you already know? How is this lesson relevant to every day life? We need to be able to identify hazards and then take appropriate action to work safely.
22:09 Keywords: Create sentences using the keywords to show that you know what they mean. Put your hand up if there is any key word from the list that you don’t understand. laboratory bunsen burner chimney air hole hazard safety goggles safety precautions tripod beaker thermometer gauze fair test control variables
22:09 New Information for Learning Outcome 1 Visual: Demonstration Audio: Demonstration Kinaesthetic: Class experiment
Using a Bunsen Burner Air Hole Chimney Flame (Inner Cone) Flame (Outer Cone) Heat Proof Mat Base Rubber tubing
The safe use of a bunsen burner
Using a Bunsen Burner Safety FlameTo heat things fast Roaring FlameTo heat things slowly Blue FlameWhen we are not using the bunsen but want to keep it on.
Using a Bunsen Burner
22:09 Extended Learning Extended Learning task: Write a laboratory safety guide on how to use a Bunsen Burner. You should include: How to light a Bunsen burner How to adjust the flame Safety precautions Due date: Criteria for Level 5: – Basic description, basic detail. Criteria for Level 6: – Description with explanation and good level of detail. Criteria for Level 7: – Detailed description and in depth detailed explanation using examples to highlight points made.
22:09 Create Evaluate Analyse Apply Understand Remember Apply (L5) Did you get your bunsen burner licence? Understand (L4) Can you explain how to use a bunsen burner safely? Demonstrate your Learning for Outcome 1 I am working at level.... because
22:09 Learning Outcome 1: Review Learning OutcomeHow I didTargets Learning Outcome 1: Level 5 Met? Partly met? Not met? How can I improve on Learning Outcome 1? Go back to your Learning Outcome grid and fill out the ‘How I did’ and the ‘Targets’ column. To be able to use a bunsen burner safely.
thermometer beaker of water tripod bunsen burner heat proof mat What safety precautions must be taken when doing this test? New Information for Learning Outcome 2
Investigating the heating effects of Bunsen burner flames Method 1.Put 200cm 3 of cold water into a glass beaker. 2.Measure the temperature of the water, and record it in a results table. 3.Light the Bunsen burner. 4.Adjust the Bunsen burner to the correct flame and start heating the water. 5.Start the timer. 6.Record the temperature every 30s until the temperature reaches 65 o C. 7.Repeat 1-6 using a different bunsen flame. 8.Plot a graph showing both experiments on the same set of axes. Time (s) Blue flame temperature ( o C) Roaring flame temperature ( o C)
Investigating the heating effects of Bunsen burner flames Method 1.Put 200cm 3 of cold water into a glass beaker. 2.Measure the temperature of the water, and record it in a results table. 3.Light the Bunsen burner. 4.Adjust the Bunsen burner to the correct flame and start heating the water. 5.Start the timer. 6.Record the temperature every 30s until the temperature reaches 65 o C. 7.Repeat 1-6 using a different bunsen flame. 8.Plot a graph showing both experiments on the same set of axes. Time (s) Blue flame temperature ( o C) Roaring flame temperature ( o C) time (s) temperature ( o C)
Conclusion (Work with your neighbour) Step 1 – Think about the experiment (Make bullet point notes) What were we trying to find out? What was changed (indepenedent variable)? What was measured (dependent variable)? How was the experiment made to be a fair test (control variables)? What was found out? Step 2 – Write your conclusion Use your notes from Step 1 to help you. Some useful words: Firstly… Then …. Then….. Finally consequently, because, whenever, depending upon, eventually, since/until
Conclusion – copy and complete In our experiments we measured the change in temperature of the water every 30s until a temperature of 65 o C was reached. We used two different Bunsen flames. To make our tests fair the control variables were the same: Size beaker. Volume of cold water. We found out that
22:09 Create Evaluate Analyse Apply Understand Remember Apply (L5) Did you: 1.Complete the experiment ? 2.Plot a graph? Analyse (L6) Did you: 1.Identify the control variables. 2.Write a sensible conclusion? Demonstrate your Learning for Outcome 2 I am working at level.... because To get to the next level I need to
22:09 Learning Outcome 2: Review Learning OutcomeHow I didTargets Learning Outcome 2: Level 6 Met? Partly met? Not met? How can I improve on Learning Outcome 2? Go back to your Learning Outcome grid and fill out the ‘How I did’ and the ‘Targets’ column. To carry out an experiment to investigate the heating effect of different bunsen flames.
22:09 Review for Remembering Stand up if you have met the lesson outcomes? If not what do you need to do next in order to meet the outcome? Record this in your diary as part of your homework. Is there any part of the lesson you think you need to go over again next lesson? Tell the person next to you three things you have learnt this lesson. How will you remember this for your exam?
Extension – Using a bunsen burner for flame tests Heating a metal compound in a bunsen flame and observing the colour can be used to identify the metal that is present. The colours of fireworks are due to the presence of particular metal salts. Procedure: 1.Light the burner. 2.Take a wood splint, wet one end with water and then dip the soaked end into a solid sample. 3.Hold the end of the wood splint containing the crystals into a burner flame and observe the colors. 4.Place the wood splint in your beaker of water to extinguish it. 5.Record the colors in the chart. 6.Using a fresh wood splint each time, repeat the test with the other samples. Learning Activities for Outcome 3
Technician’s list 250ml glass beakers o C thermometers Bunsens Tripods Gauzes Heat proof mats Splints & matches Chem 1 L01 spot hazard worksheet Bunsen burner worksheet (http://www.echalk.co.uk/Science/practicalSkills/BunsenBurner/DnD/BunsenWorksheet.pdf)http://www.echalk.co.uk/Science/practicalSkills/BunsenBurner/DnD/BunsenWorksheet.pdf Supply of elastic bands so students’ hair can be tied back Solid samples of salts containing the following metal ions for flame tests sodium – yellow-orange potassium – lilac lithium – red copper – green/blue barium – apple green
22:09 Create Evaluate Analyse Apply Understand Remember Apply (L5) Use Build Execute Develop Construct Identify Plan Select Solve Organise Apply Model Understand (L4) Explain what when where how Rephrase Demonstrate Summarise Contrast Show Predict Compare Clarify Illustrate Categorise Remember (L3) Who What When Where Why Which How Match Define List Choose Name Spell Tell Describe Analyse (L6) Take apart Compare Classify Examine List Distinguish Simplify Theme Conclude Motive Discover Evaluate (L7) Judge Justify Defend Decide Agree Value Prove Check Criticise Recommend Support Test Create (L8) Combine construct Develop Imagine Design Change Improve Discuss Create Invent Suppose Put together Make up Synthesise Demonstrate your Learning for Outcome 1 Keywords: