CKS3: Yr7 Chemistry Unit 1

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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
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New Information for Task 1
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BIG picture
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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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
dont 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

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Using a Bunsen Burner
Flame (Outer Cone)
Flame (Inner Cone)
Chimney
Air Hole
Heat Proof Mat
Base
Rubber tubing
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The safe use of a bunsen burner
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(No Transcript)
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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?
Safety Flame To heat things fast Roaring
Flame To heat things slowly Blue Flame When we
are not using the bunsen but want to keep it
on.
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Using a Bunsen Burner
Air hole open Air hole half-open Air hole closed
Type of Flame Roaring Flame Blue Flame Safety Flame
When do we need to use this flame? To heat things fast To heat things slowly When we are not using the Bunsen but want to keep it on.
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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.

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Demonstrate your Learning for Outcome 1
I am working at level .... because ...........
Apply (L5) Did you get your bunsen burner licence?
Understand (L4) Can you explain how to use a
bunsen burner safely?
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Learning Outcome 1 Review
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 How I did Targets
Learning Outcome 1 Level 5 Met? Partly met? Not met? How can I improve on Learning Outcome 1?
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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.act
ion?quickt1att2080
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Investigating the heating effects of Bunsen
burner flames

• Method
• Put 200cm3 of cold water into a glass beaker.
• Measure the temperature of the water, and record
  it in a results table.
• Light the Bunsen burner.
• Adjust the Bunsen burner to the correct flame
  and start heating the water.
• Start the timer.
• Record the temperature every 30s until the
  temperature reaches 65oC.
• Repeat 1-6 using a different bunsen flame.
• 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
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Investigating the heating effects of Bunsen
burner flames

• Method
• Put 200cm3 of cold water into a glass beaker.
• Measure the temperature of the water, and record
  it in a results table.
• Light the Bunsen burner.
• Adjust the Bunsen burner to the correct flame
  and start heating the water.
• Start the timer.
• Record the temperature every 30s until the
  temperature reaches 65oC.
• Repeat 1-6 using a different bunsen flame.
• 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
65
temperature (oC)
0
0
time (s)
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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
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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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Demonstrate your Learning for Outcome 2
I am working at level .... because ...........
To get to the next level I need to ...........

• Analyse (L6)
• Did you
• Identify the control variables.
• Write a sensible conclusion?

• Apply (L5)
• Did you
• Complete the experiment ?
• Plot a graph?

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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 How I did Targets
Learning Outcome 2 Level 6 Met? Partly met? Not met? How can I improve on Learning Outcome 2?
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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?

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Learning Activities for Outcome 3
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
• Light the burner.
• Take a wood splint , wet one end with water and
  then dip the soaked end into a solid sample.
• Hold the end of the wood splint containing the
  crystals into a burner flame and observe the
  colors.
• Place the wood splint in your beaker of water to
  extinguish it.
• Record the colors in the chart.
• Using a fresh wood splint each time, repeat the
  test with the other samples.

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Technicians list 250ml glass beakers 0-110 oC
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/B
unsenBurner/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 lilaclithium
redcopper green/bluebarium apple green
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Demonstrate your Learning for Outcome 1
Keywords
Create (L8) Combine construct Develop Imagine
Design Change Improve Discuss Create Invent
Suppose Put together Make up Synthesise
Evaluate (L7) Judge Justify Defend Decide Agree
Value Prove Check Criticise Recommend Support Test
Analyse (L6) Take apart Compare Classify Examine
List Distinguish Simplify Theme Conclude Motive
Discover
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