Transcript File

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
Connector:
Learning Outcome 2:
To carry out an experiment to
investigate the heating effect of
different bunsen flames.
Level 6
• Record your answers in a table.
Extension activity:
Using a bunsen burner for flame tests.
•
• Using the work sheet identify the
safety hazards in the picture – there
are at least 17!
11:30
Cro2011
New Information for Task 1
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
11:30
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?
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
11:30
tripod
beaker
thermometer
gauze
fair test
control variables
New Information for Learning Outcome 1
• Visual: Demonstration
• Audio: Demonstration
• Kinaesthetic: Class experiment
11:30
Using a Bunsen Burner
Flame (Outer Cone)
Flame (Inner Cone)
Chimney
Air Hole
Heat Proof Mat
Base
Rubber tubing
The safe use of a bunsen burner
Using a Bunsen Burner
Air hole
Air hole
open
half-open
Air hole
closed
Type of Flame
When do we
need to use this
flame?
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
Type of
Flame
When do we
need to use
this flame?
Air hole
open
Air hole
half-open
Roaring
Flame
Blue Flame
To heat
things fast
Air hole
closed
Safety Flame
When we are
not using the
To heat
things slowly Bunsen but
want to keep
it on.
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.
11:30
Demonstrate your Learning
for Outcome 1
Create
I am working at level ....
because ...........
Evaluate
Apply (L5)
Did you get your bunsen
burner licence?
Analyse
Apply
Understand (L4)
Understand
Remember
11:30
Can you explain how to
use a bunsen burner
safely?
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
Learning Outcome 1:
Level 5
11:30
How I did
Met?
Partly met?
Not met?
Targets
How can I improve
on Learning
Outcome 1?
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 Blue flame
Roaring flame
(s) temperature temperature
(oC)
(oC)
0
30
60
Method
1. 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.
Investigating the heating effects of Bunsen burner flames
Time Blue flame
Roaring flame
(s) temperature temperature
(oC)
(oC)
0
30
temperature (oC)
60
65
0
0
time (s)
Method
1. 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.
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 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 ..........
Demonstrate your Learning
for Outcome 2
I am working at level ....
because ...........
Create
Evaluate
To get to the next level I
need to ...........
Analyse (L6)
Apply (L5)
Analyse
1. Identify the control variables.
Did you:
1. Complete the experiment ?
Did you:
Apply
2. Plot a graph?
Understand
Remember
11:30
2. Write a sensible conclusion?
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:
Level 6
11:30
How I did
Met?
Partly met?
Not met?
Targets
How can I improve
on Learning
Outcome 2?
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?
11:30
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:
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 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/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
Create (L8)
Evaluate (L7)
Judge Justify Defend
Decide Agree Value Prove
Check Criticise
Recommend Support Test
Create
Evaluate
Combine construct Develop
Imagine Design Change
Improve Discuss Create Invent
Suppose Put together Make up
Synthesise
Analyse (L6)
Apply (L5)
Use Build Execute
Develop Construct
Identify Plan Select Solve
Organise Apply Model
Analyse
Apply
Remember (L3)
Understand
Who What When Where
Why Which How Match
Define List Choose Name
Spell Tell Describe
Remember
11:30
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