Year 10asc1
Starter
Complete the sentence
Plants get their energy from
Now increase the level of
your answer by adding
more detail.
Now increase the level of your
answer by adding more detail.
Plants get their energy from
sugar that is made during
photosynthesis
Make it even better
Plants get their energy by the following
equation for respiration
Glucose + oxygen
carbon dioxide + water + Energy
WALT
To know that some fruit, nuts and seeds contain oils and
outline how oils are extracted from plant materials. To
know what unsaturated oils are and how we can test for
them.
WILF
All are able to identify a method to extract oils
from plants (grade D)
Most are able to describe how oils are extracted
from plant materials and how to test for
unsaturation (grade C)
Some are able to evaluate the methodology and
explain how to make improvements (grade B)
Distillation Apparatus
Task
1. Draw and label the distillation apparatus.
2. Describe how the oil is extracted by this
method (use bullet points)
WALT
To know that some fruit, nuts and seeds contain oils and
outline how oils are extracted from plant materials. To
know what unsaturated oils are and how we can test for
them.
WILF
All are able to identify a method to extract oils
from plants (grade D)
Most are able to describe how oils are extracted
from plant materials and how to test for
unsaturation (grade C)
Some are able to evaluate the methodology and
explain how to make improvements (grade B)
Cold Pressing Olive Oil
Grinder with two millstones
First the olives are ground into an olive paste using large
millstones. The olive paste generally stays under the stones for
30 to 40 minutes.
Objectives
• To guarantee the olives are well ground
• To allow small droplets to form large droplets of oil
• To allow fruit enzymes to produce
some of the aromas and taste
Pressing
After grinding, the olive paste is spread on fibre disks, which are
stacked on top of each other, then placed into the press.
Traditionally the disks were made
of hemp or coconut fibre, but in modern times
they’re made of synthetic fibres which
are easier to clean and maintain.
Testing for Unsaturation
Saturated fats and oils have only single
bonds
Unsaturated fats and oils have some
carbon atoms joined by double bonds
Unsaturated compounds turn orange
bromine water colourless
Unsaturated fats turn iodine solution
colourless
WALT
To know that some fruit, nuts and seeds contain oils and
outline how oils are extracted from plant materials. To
know what unsaturated oils are and how we can test for
them.
WILF
All are able to identify a method to extract oils
from plants (grade D)
Most are able to describe how oils are extracted
from plant materials and how to test for
unsaturation (grade C)
Some are able to evaluate the methodology and
explain how to make improvements (grade B)
Practical Task
1.
2.
3.
4.
5.
6.
7.
8.
Collect your equipment – mortar and pestle, a
tablespoon of seeds, plastic pipette, test tubes x 2,
ethanol
Grind the seeds in the mortar with the pestle
Add ethanol carefully a few drops at a time to extract
the oil
Add a few drops to a test tube with a small amount of
iodine solution in it and observe.
Half fill a test tube with water
Using a pipette layer some of the extract onto the
water
If a white opaque layer forms this is positive for fats
Repeat with a different type of seed
Practical write up
Write a brief report on the practical which
includes the following
a) You need to identify the independent and
dependent variables
b) State which variables should be
controlled
c) Describe what you found out and explain
why it happened
d) Evaluate the method – you will need to
describe what is good about it, what is
poor and how it can be improved
Peer Assess
Read the evaluation of another
student.
Suggest ways that they could
improve their evaluation write up
WALT
To know that some fruit, nuts and seeds contain oils and
outline how oils are extracted from plant materials. To
know what unsaturated oils are and how we can test for
them.
WILF
All are able to identify a method to extract oils
from plants (grade D)
Most are able to describe how oils are extracted
from plant materials and how to test for
unsaturation (grade C)
Some are able to evaluate the methodology and
explain how to make improvements (grade B)
Part 2
Saturated and unsaturated
oils
WALT What is unsaturation and why is it
important for good health ?
WILF
All are able to identify the difference between a
saturated and unsaturated oil (grade D)
Most are able to describe what is unsaturation and
carry out practical work to determine the
saturation of an oil (grade C)
Some are able to explain how and why oils affect
health (grade B)
Starter
1.
2.
3.
4.
What does the term unsaturation mean?
Are alkanes or alkenes unsaturated?
How do we test for unsaturation?
Are saturated or unsaturated oils best for
your health?
5. Explain the reason for your answer
Complete the diagram
Where are vegetable oils used
Using plant oils
Chemistry of fats and oils
What are the differences between fats?
Saturated fats contain no
carbon-to-carbon double
bonds. The straight fatty
acids chains pack closely
together.
Unsaturated fats contain at
least one carbon-to-carbon
double bond. This bends the
fatty acid chains and they
cannot pack closely together.
Saturated fats are less healthy than unsaturated fats because
the dense packing makes them harder for the body to digest.
Fats and Health
Use the additional applied text books to find
out why some types of fat are bad for you.
Write a paragraph into your exercise books
using the information you found
WALT What is unsaturation and why is it
important for good health ?
WILF
All are able to identify the difference between a
saturated and unsaturated oil (grade D)
Most are able to describe what is unsaturation and
carry out practical work to determine the
saturation of an oil (grade C)
Some are able to explain how and why oils affect
health (grade B)