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CKS3: Yr7 Chemistry Unit 1 – Me the the Scientist!Lesson number: 1. Lesson Title: Using the bunsen burner.
Learning Outcomes How I did Targets
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
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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.
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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
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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 Flame To heat things fastRoaring Flame To heat things slowlyBlue Flame When we are not using the bunsen but
want to keep it on.
Using a Bunsen Burner
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Extended LearningExtended Learning task:Write a laboratory safety guide on how to use a Bunsen Burner. You should include:
How to light a Bunsen burnerHow to adjust the flameSafety 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.
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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 ...........
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Learning Outcome 1: Review
Learning Outcome How I did Targets
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.
http://www.absorblearning.com/media/attachment.action?quick=t1&att=2080
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 flamesMethod1. Put 200cm3 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 65oC.
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
(oC)
Roaring flame temperature
(oC)
0
30
60
Investigating the heating effects of Bunsen burner flamesMethod1. Put 200cm3 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 65oC.
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
(oC)
Roaring flame temperature
(oC)
0
30
60
time (s)
tem
pera
ture
(o C
)
00
65
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….. Finallyconsequently, 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 65oC 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 ..........
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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 ...........
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Learning Outcome 2: Review
Learning Outcome How I did Targets
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.
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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 beakers0-110 oC thermometersBunsensTripodsGauzesHeat proof matsSplints & matches
Chem 1 L01 spot hazard worksheetBunsen burner worksheet (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 testssodium – yellow-orange potassium – lilaclithium – redcopper – green/bluebarium – apple green
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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: