Year 10asc1

StarterComplete 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.

WILFAll 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 millstonesFirst 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

PressingAfter 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 UnsaturationSaturated 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 Task1. Collect your equipment – mortar and pestle, a

tablespoon of seeds, plastic pipette, test tubes x 2, ethanol

2. Grind the seeds in the mortar with the pestle3. Add ethanol carefully a few drops at a time to extract

the oil4. Add a few drops to a test tube with a small amount of

iodine solution in it and observe.5. Half fill a test tube with water6. Using a pipette layer some of the extract onto the

water7. If a white opaque layer forms this is positive for fats8. Repeat with a different type of seed

Practical write upWrite a brief report on the practical which

includes the followinga) You need to identify the independent and

dependent variablesb) State which variables should be

controlledc) Describe what you found out and explain

why it happenedd) Evaluate the method – you will need to

describe what is good about it, what is poor and how it can be improved

Peer AssessRead 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. What does the term unsaturation mean?

2. Are alkanes or alkenes unsaturated?

3. How do we test for unsaturation?

4. 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)