NAME ___________________ Photosynthesis revision map

Photosynthesis Limiting factors

During photosynthesis _____________ energy is converted into Three factors that can limit the _______ of photosynthesis are:
______________ energy.
Because the plant is making its own food it is…
The plant organ this process take place in =
The organelle this process takes place in =
The pigment this process requires =
Word equation

Balanced symbol equation

Essential practical – the rate of

photosynthesis
Pond weed is useful, because we can measure Essential practical – what does photosynthesis require?
the ___________ of __________ produced. Plants store glucose as ___________________. We can test for this using ___________________ . The positive result is a
This allows to determine the ______ of colour change from _________________ to _____________________ .
3. To safely test for starch we
___________. 1. We must destarch the leaf. must:
We do this by… a. Boil the leaf in water
Two ways to measure the ____________ of ____________
b. Heat the leaf in _________ (to
1) This works because… remove _____________)
2) 2. Now we can see what conditions are needed for photosynthesis to take place c. Using a ______________
No photosynthesis → No glucose → No starch → Negative iodine test d. Test using iodine
Different independent variables we could investigate & how we
would do this: Factor being removed How is it removed from leaf
1) Light
2) Air-tight bag with soda lime
3) Use a variegated leaf
NAME ___________________ Photosynthesis revision map
Adaptations of the leaf
The leaf is a highly specialised organ in order to increase the ____________ of _________________________

Obtaining light Obtaining carbon dioxide Obtaining water

Broad shape gives a large ___ Broad shape gives a large ___ Water comes from the _______ in
Across
Palisade cells are packed full of Holes called _________ allow CO2 to ________ vessels
2. The energy needed to drive photosynthesis (5) __________ _________ in The _______ cuticle prevents
6. The gas produced during photosynthesis (6) These contain _________ which allows Leaf is thin – reducing the __________
8. This increases the rate of photosynthesis as it rises, but if it gets too high it them to _________ light ___________________ _______ cells can close the _______
causes the rate to drop (11) The upper ___________ is Mesophyll layer contains many
___________ allowing light through ______ ________
10. The gas used up in photosynthesis (6,7)

Down
1. The green pigment that absorbs light (11)
3. The chemical used to test for starch (6)
4. The carbohydrate produced by combining water with carbon dioxide (7)
5. The liquid taken up in photosynthesis (5)
7. These can open and close to change the amount of water loss (7)
9. Means "making something new using light" (14)

Mineral ions

Mineral ions are absorbed by the ____________ using the process of _________ _________, _________ a
concentration gradient.

Root hair cells have a special shape giving them a large ______ _______

Mineral ion Use in the plant Symptom of deficiency

Nitrate Make _______ ________, and then
___________ for _________
Making chlorophyll, to ________ light
in photosynthesis
Potassium

Used in DNA and cell membranes

Areas I feel confident with… Areas I am unsure about…