CKS3: Yr7 Chemistry Unit 1 – Me the the Scientist!
Lesson number: 1.
Lesson Title: Using the bunsen burner.
Learning Outcomes
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.
How I did Targets
Connector:
• Using the work sheet identify the safety hazards in the picture – there are at least 17!
• Record your answers in a table.
•
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Key Question: How do you safely heat substances in a laboratory?
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
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.
Quick Discussion:
What do you already know?
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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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• Visual: Demonstration
• Audio: Demonstration
• Kinaesthetic: Class experiment
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Flame (Outer Cone)
Flame (Inner Cone)
Chimney
Air Hole
Heat Proof Mat
Base
Rubber tubing

The safe use of a bunsen burner

Type of Flame
Using a Bunsen Burner
Air hole open
Air hole half-open
When do we need to use this flame?
Air hole closed
Safety Flame
Roaring Flame
Blue Flame
To heat things fast
To heat things slowly
When we are not using the bunsen but want to keep it on.

Using a Bunsen Burner
Air hole open
Air hole half-open
Air hole closed
Type of
Flame
When do we need to use this flame?
Roaring
Flame
To heat things fast
Blue Flame Safety Flame
To heat things slowly
When we are not using the
Bunsen but want to keep it on.

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.
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Demonstrate your Learning for Outcome 1
Apply (L5)
Did you get your bunsen burner licence?
Create
Evaluate
Analyse
Apply
Understand
Remember
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I am working at level .... because ...........
Understand (L4)
Can you explain how to use a bunsen burner safely?

To be able to use a bunsen burner safely.
Go back to your Learning Outcome grid and fill out the
‘How I did’ and the ‘Targets’ column.
Learning Outcome
Learning Outcome 1:
How I did Targets
Met?
Partly met?
Not met?
How can I improve on Learning
Outcome 1?
Level 5
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New Information for Learning Outcome 2 thermometer beaker of water tripod bunsen burner heat proof mat
What safety precautions must be taken when doing this test? http://www.absorblearning.com/media/attachment.action?quick=t1&att=2080

Investigating the heating effects of Bunsen burner flames
Time
(s)
Blue flame temperature
( o C)
Roaring flame temperature
( o C)
0
30
60
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.

65
0
0
Investigating the heating effects of Bunsen burner flames
Time
(s)
Blue flame temperature
( o C)
Roaring flame temperature
( o C)
0
30
60 time (s)
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.

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 ..........

Demonstrate your Learning for Outcome 2
Create
Evaluate
Apply (L5)
Did you:
1. Complete the experiment ?
2. Plot a graph?
Analyse
Apply
Understand
I am working at level .... because ...........
To get to the next level I need to ...........
Analyse (L6)
Did you:
1. Identify the control variables.
2. Write a sensible conclusion?
Remember
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Learning Outcome 2: Review
To carry out an experiment to investigate the heating effect of different bunsen flames.
Go back to your Learning Outcome grid and fill out the
‘How I did’ and the ‘Targets’ column.
Learning Outcome
Learning Outcome 2:
How I did
Met?
Partly met?
Not met?
Targets
How can I improve on Learning
Outcome 2?
Level 6
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• 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?
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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.

Technician’s list
250ml glass beakers
0-110 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
)
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

Keywords:
Demonstrate your Learning for Outcome 1
Evaluate (L7)
Judge Justify Defend
Decide Agree Value Prove
Check Criticise
Recommend Support Test
Apply (L5)
Use Build Execute
Develop Construct
Identify Plan Select Solve
Organise Apply Model
Remember (L3)
Who What When Where
Why Which How Match
Define List Choose Name
Spell Tell Describe
Create
Evaluate
Analyse
Apply
Understand
Remember
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Create (L8)
Combine construct Develop
Imagine Design Change
Improve Discuss Create Invent
Suppose Put together Make up
Synthesise
Analyse (L6)
Take apart Compare Classify
Examine List Distinguish
Simplify Theme Conclude
Motive Discover
Understand (L4)
Explain what when where how
Rephrase Demonstrate
Summarise Contrast Show
Predict Compare Clarify
Illustrate Categorise