Transcript Lesson number: Title (from syllabus sheet)

FEATHERSTONE HIGH SCHOOL
A Leading Edge School
Science Department
Lesson plan
Teacher information
Lesson title: separating techniques- distillation
and filtration
Provision:
1) EAL:
Technicians list:
Technicians list:
2) SEN:
Distillation demo:
Chromatography x12
Salt water
Gauze
Bunsen burner
Round bottom flask
Beaker
Condenser
alien blood:
4 blood samples made
with coloured inks
labelled A-D. (sample B
contains green).
Water as solvent.
Filter papers
Cotton Wool buds
beakers
Role of TA:
1)
2)
3)
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Syllabus/Unit Code:
Lesson number: 8
Lesson Title: separating techniques- distillation and
chromatography
Learning Outcomes
How I did
Targets
Learning Outcome 1:
Be able to describe the separating
process distillation
Level 5
I am working at
level .....because
...............................
.......................
Learning Outcome 2:
Be able to carry out and explain the
process chromatography
Level 6
I am working at
level .....because
...............................
.......................
Learning Outcome 3:
Be able to write a conclusion for the
experiment using scientific
knowledge to explain
Level 7
I am working at
level .....because
...............................
.......................
I Connector:
can move up to
level…... by
Unscramble
………………………
these
…………………
keywords
I can move up to
1) DRUESEI
level…... by
2) ESOBULL
………………………
…………………
3) RFELIT
I 4)
can NEAVTPR
move up to
level…...
ONIA by
………………………
…………………
01:05
Extended Learning
• Imagine you are a little water molecule and you have
been put into the round bottom flask. Describe your
journey as you travel from point ‘A’ to point ‘D’.
Remember to use the important science words
you learnt in your lessons.
• Due date:
• Next lesson
• Research Report Criteria (6 marks total = Level 7):
• 1) Range of different reliable sources used and references
included (books/internet/survey etc),
• 2) Information written in own words
• 3) Clear and logical structure to research report including
pictures/diagrams which have been referenced
• 4) No evidence of copy and paste!
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BIG picture
Key Question: why is distillation
And chromatography important?
•How is this
lesson relevant
• What skills will you be developing this to every day life?
lesson?
• Scientific Investigation skills- by Research
and Collecting Secondary data, Planning and
Collecting primary data, Analysis and
Evaluation.
• Numeracy- by using formulae in calculations
• Literacy- by writing well structured sentences
and paragraphs
• ICT- by using Laptops and electronic
resources
• Personal skills- team work, leadership
• Thinking and Learning skills- organisation,
logic, participation, memory, exploration,
creativity, judgement, planning, practice.
• Reflection- through self or peer assessment of
each Learning Outcome
•Quick
Discussion:
•What do you
already know?
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Keywords:
•
•
•
•
•
•
•
•
Distillation
Chromatography
Evaporation
Condensation
Solute
Solvent
Soluble
Insoluble
Here are some of
the words we will
be using this
lesson…
1) Create sentences
which use the
keywords correctly.
2) Put your hand up
if there is any key
word from the list
that you don’t know
the meaning of.
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New Information for Learning Outcome 1
Explore and Discover:
• Visual: demonstration
• Audio: demonstration
You are still stuck on
this island, but you
need water to drink!!!
• Kinaesthetic: demonstration
what options do you
01:05
have?
Learning Activities for Outcome 1
•There is one more method to get clean drinking water –
Distillation. Often there are parasites and bacteria in water.
Even after filtration these tiny organisms can be left behind.
They can make you very ill if you drink them.
•One way to kill them is by boiling the water.
•Q1: What problems can you think of with boiling your
drinking water?
•Distillation is made up of 2 steps. Boiling/Evaporation and
Condensation.
•Task 1: Watch the teacher demonstration. Label the diagram
using the words.
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Distillation
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Keywords:
Demonstrate your
Learning for
Outcome 1
Create
Evaluate
Analyse
Apply (L5)
Describe in detail
distillation using
scientific keywords
Apply
Understand
Understand (L4)
Be able to describe distillation
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Remember
Learning Outcome 1: Review
Go back to your Learning Outcome grid and fill out
the ‘How I did’ and the ‘Targets’ column.
Learning Outcome
Learning Outcome 1:
Be able to describe the
separating process distillation
Level 5
How I did
Targets
I am working at
level .....because
...........................
...........................
I can move up to
level…... by
……………………
……………………
01:05
New Information for Learning Outcome 2
Explore and Discover:
• Visual: demonstration
• Audio: demonstration
• Kinaesthetic: class practical
01:05
•Chromatography is a method scientists can use to separate
mixtures.
•If we had a mixture of sweets in a bag we could use our _________ to
separate
the sweets into different groups.
•
•Can you think of any other mixtures that are easy to
separate?
•Chromatography can be used to separate a mixture of different
liquids.
•E.g. A mixture of different coloured inks in a felt tip pen factory.
•
A mixture of different bloods found at a Crime Scene.
•Before they can use chromatography, scientists need to know the
meaning of some important scientific words.
• These words are:
•Liquid Soluble Chromatography Solute
Solvent Chromatogram Solution
Dissolve
Insoluble
What is chromatography?
•Chromatography is used to separate mixtures of coloured
or non-coloured substances that are soluble in the same
solvent.
•A spot of the mixture is placed on some filter paper.
•In method A, the solvent
is soaked up the paper.
•In method B, the solvent or is
slowly dripped onto the paper.
•The substances in the mixture get separated because the
more soluble substance spreads along the paper faster.
Identifying dyes in a mixture
•Chromatography can be used to find out if a dye is made
up of a single coloured substance or a mixture.
•Dots of known single dyes are placed alongside the dot
for the unknown mixture. After the solvent washes through
the paper, the pattern of the dyes in the mixture is
compared with the single dyes.
•Which dyes does the mixture consist of?
•There are 4 important words we use when talking
about mixtures:
•Solute, Solvent, Solution and Solubility.
Using the example of the Cup of tea:
The sugar in the solute.
The tea is the solvent.
The sweet tea is the solution made.
We can say that sugar is soluble in tea or that sugar has
dissolved in the tea.
Task : Draw a large diagram of a cup of tea and label
it using the key words.
Learning Activities for Outcome 2
•
You are walking through the island and you find some blood on a tree branch, but it
doesn’t seem like normal blood
•
You realise you aren’t alone and suspect there is an alien on the island!!!
•
You decide to investigate the island to obtain some samples
•http://www.freeaudioclips.com/list.ph
p?subcatid=32&subcat=Movies%2FT
V+X+-+Z&cat=8
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Method
• You will have four samples to analyse taken
from various points on the island.
• You will carry chromatography and the sample
of blood that contains the green colour shows
presence of alien life
• Copy table into book
Sample
Scene
A
On the sand
B
Rocky cave
C
Tree branch
D
pebble
Colours found
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Method.
•
The apparatus will be set as shown in the diagram below.
•
Cut the paper to make a small flap about 2 – 3 cm this will be placed in the
beaker.
•
Fold the paper back along the top of the small flap you have just cut out.
•
Each sample will be placed on a different piece of paper, just above the pencil
line using a small cotton bud.
•
Place the paper in the beaker of water making sure the pencil line is above the
water level.
•
After 10 minutes remove your chromatograms and allow them to dry in a
sensible and safe place.
•
Be careful the pieces of paper DO NOT over lap as this could contaminate your
results.
Diagram.
•Fold along here
•Cut along here
•Cut along here
•Sample
•Pencil line
•Beaker
•Water
•Filter paper
•Sample
•Pencil line
Keywords:
Demonstrate your
Learning for
Outcome 2
Create
Evaluate
Analyse (L6)
Apply (L5)
Be able to explain
chromatography using
scientific keywords
Analyse
Be able to evaluate the method
used
Apply
Understand
Understand (L4)
Be able to describe
chromatography
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Remember
Learning Outcome 2: Review
Go back to your Learning Outcome grid and fill out
the ‘How I did’ and the ‘Targets’ column.
Learning Outcome
How I did
Learning Outcome 2:
Be able to carry out and explain I am working at
level .....because
the process chromatography
...........................
...........................
Level 6
Targets
I can move up to
level…... by
……………………
……………………
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New Information for Learning Outcome 3
Explore and Discover:
• Visual: demonstration
• Audio: demonstration
• Kinaesthetic: demonstration
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Learning Activities for Outcome 3
• For chromatography write a conclusion for the
results. The conclusion must include the
following points
• What you found out
• How the process works (include diagrams to
illustrate)
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Keywords:
Demonstrate your
Learning for
Outcome 3
Create
Evaluate
Apply (L5)
Say what you found out
and explain your results
using some scientific
knowledge
Analyse
Analyse (L6)
Explain results and use
scientific knowledge to explain
the process of
chromatography using
keywords
Apply
Understand
Understand (L4)
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Remember
State what you found out from
the experiment
Learning Outcome 3: Review
Go back to your Learning Outcome grid and fill out
the ‘How I did’ and the ‘Targets’ column.
Learning Outcomes
How I did
Learning Outcome 3:
Be able to write a conclusion for I am working at
level .....because
the experiment using scientific
...........................
knowledge to explain
...........................
Targets
I can move up to
level…... by
……………………
……………………
Level 7
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Review ( true or false)
• Distillation involves boiling, evaporating and
condensation
• Distillation can only be done to purify water
• Tap water is distilled
• Solute is the solid that you are dissolving
• Chromatography is the method in which mixtures are
separated
• Solvent means it can dissolve
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