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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: