The importance of leaves
Describe the process of photosynthesis
Reference: SW9 Pg 255
All plants (and some protists) can do photosynthesis!
Task 7
Watch the following video
http://www.youtube.com/watch?v=C1_uez5WX1o
Describe the process of photosynthesis
Reference: SW9 Pg 255
All plants (and some protists) can do photosynthesis!
Task 7
Watch the following video
http://www.youtube.com/watch?v=C1_uez5WX1o
Using the video and the picture, complete the word equation for photosynthesis
X + X --> X + X
Where have the reactants (the chemicals/energy) needed for photosynthesis come from?
Water X
Carbon dioxide X
What happens to the products (chemicals made in the reaction) of photosynthesis?
Oxygen X
Sugars X
(The scientific term for the sugar produced is GLUCOSE)
Where in the plant does photosynthesis occur? X
What part of the plant cell contains the chlorophyll needed to make photosynthesis happen? X
Where does the light come from? X
SciPad Pg 124-125
Explain the importance of photosynthesis
Photosynthesis is the only way energy can be turned into food. This means that all living organism rely on photosynthesis in order to get energy in the form of food. Animals and fungi need to eat other organism to get their energy but plants can make their own.
Task 8
Think of eating a hamburger. Where has the energy from the different ingredients come from? How can each ingredient be tracked back to a plant?
e.g. Bread bun – made from plant (flour is ground up seeds)
Beef patty – X
Tomato – X
Lettuce – X
Cheese – X
Task 9
Write a paragraph discussing how photosynthesis works and why it is important to life. Include
X
Explain the importance of food storage
Reference SW9 Pg 263-264
Task 10
Watch this video
http://www.youtube.com/watch?v=r-z7hbCFI2o
The glucose that plants make can easily dissolve in water. Leaves make the glucose but other parts of the plant need it as well
in order for the cells to get energy.
What is the name of the vessels that take the glucose from the leaves to the rest of the plant? X
What substance can glucose be converted into? X
Look this substance up on the internet. Does it dissolve in water? X
This means it can be stored in parts of the plants. Plants make lots more glucose than they actually need. By storing the extra glucose, they can use this to produce flowers; grow; survive when little light is available and other things which require a lot of energy.
Task 11
If you put iodine solution on starch, it will turn a dark blue-black colour. Place a couple of drops of iodine on carrot, potato and onion. Take
photos and paste them here:
X
Food is stored in the following parts of a plant:
X example:
X example:
X example:
Explain the structure of the leaf, and adaptations for photosynthesis
Leaves are designed to make the most amount of glucose by photosynthesis as possible.
Task 12
Explain why leaves have these adaptations to allow maximum photosynthesis
Thin X
Large X
Green colour X
Look at http://en.wikipedia.org/wiki/Leaf and http://www.bbc.co.uk/schools/gcsebitesize/science/add_edexcel/organism_energy/photosynthesisrev1.shtml
Task 13
Past in a cross-section diagram of a leaf
X
Describe the function for each part of the leaf
Waxy cuticle X
Upper epidermis X
Palisade layer X
Spongy mesophyll X
Stomata and guard cells X
Vein X
Lower epidermis X
SciPad Pg 123, 128
Task 14
How important is chlorophyll and sunlight to photosynthesis?
Experiment, SciPad Pg 126-127
Take a photo of the results from your leaf and paste it in. Label it with:
If there was photosynthesis taking place, then glucose was made. This would be converted into starch which turns blue-black with iodine.
Was starch made where there was...?
What conditions did the leaf need in order for photosynthesis to occur?
X
X + X --> X + X
Where have the reactants (the chemicals/energy) needed for photosynthesis come from?
Water X
Carbon dioxide X
What happens to the products (chemicals made in the reaction) of photosynthesis?
Oxygen X
Sugars X
(The scientific term for the sugar produced is GLUCOSE)
Where in the plant does photosynthesis occur? X
What part of the plant cell contains the chlorophyll needed to make photosynthesis happen? X
Where does the light come from? X
SciPad Pg 124-125
Explain the importance of photosynthesis
Photosynthesis is the only way energy can be turned into food. This means that all living organism rely on photosynthesis in order to get energy in the form of food. Animals and fungi need to eat other organism to get their energy but plants can make their own.
Task 8
Think of eating a hamburger. Where has the energy from the different ingredients come from? How can each ingredient be tracked back to a plant?
e.g. Bread bun – made from plant (flour is ground up seeds)
Beef patty – X
Tomato – X
Lettuce – X
Cheese – X
Task 9
Write a paragraph discussing how photosynthesis works and why it is important to life. Include
- a definition of photosynthesis
- what is needed
- what is produced
- a word equation showing photosynthesis
- why all living things rely on it
X
Explain the importance of food storage
Reference SW9 Pg 263-264
Task 10
Watch this video
http://www.youtube.com/watch?v=r-z7hbCFI2o
The glucose that plants make can easily dissolve in water. Leaves make the glucose but other parts of the plant need it as well
in order for the cells to get energy.
What is the name of the vessels that take the glucose from the leaves to the rest of the plant? X
What substance can glucose be converted into? X
Look this substance up on the internet. Does it dissolve in water? X
This means it can be stored in parts of the plants. Plants make lots more glucose than they actually need. By storing the extra glucose, they can use this to produce flowers; grow; survive when little light is available and other things which require a lot of energy.
Task 11
If you put iodine solution on starch, it will turn a dark blue-black colour. Place a couple of drops of iodine on carrot, potato and onion. Take
photos and paste them here:
X
Food is stored in the following parts of a plant:
X example:
X example:
X example:
Explain the structure of the leaf, and adaptations for photosynthesis
Leaves are designed to make the most amount of glucose by photosynthesis as possible.
Task 12
Explain why leaves have these adaptations to allow maximum photosynthesis
Thin X
Large X
Green colour X
Look at http://en.wikipedia.org/wiki/Leaf and http://www.bbc.co.uk/schools/gcsebitesize/science/add_edexcel/organism_energy/photosynthesisrev1.shtml
Task 13
Past in a cross-section diagram of a leaf
X
Describe the function for each part of the leaf
Waxy cuticle X
Upper epidermis X
Palisade layer X
Spongy mesophyll X
Stomata and guard cells X
Vein X
Lower epidermis X
SciPad Pg 123, 128
Task 14
How important is chlorophyll and sunlight to photosynthesis?
Experiment, SciPad Pg 126-127
Take a photo of the results from your leaf and paste it in. Label it with:
- areas that had chlorophyll at the start
- areas that had no chlorophyll at the start
- area that had light blocked from it
If there was photosynthesis taking place, then glucose was made. This would be converted into starch which turns blue-black with iodine.
Was starch made where there was...?
- chlorophyll and light? X
- chlorophyll but the light was blocked? X
- light but no chlorophyll? X
What conditions did the leaf need in order for photosynthesis to occur?
X