# data[].attributes.headline
Missing* How does temperature affect the rate of photosynthesis

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Missing* How does temperature affect the rate of photosynthesis

# data[].attributes.headline
Missing *How does concentration of CO2 affect rate of photosynthesis

# data[].attributes.subject
Missing *How does concentration of CO2 affect rate of photosynthesis

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1. Remove a leaf from the plant
2. Fill a beaker with water and use a bunsen burner to heat the water until it boils
3. Leave the leaf in the boiling water for 30 seconds
4. Fill a test boiling tube with ethanol, place the leaf inside the test tube and place it inside the beaker with boiling water
5. Place leaf into a beaker of water to soften the leaf
5. Spread the leaf onto a white tile and add iodine solution to test for starch

Starch is present: Orange brown to blue black
Starch is not present: Remains blue black orange brown!!

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1. Destarch two pots of plants and place a pot of soda lime on one and a pot of sodium hydrogen carbonate solution to another
2. Cover both plants with clear plastic bags and secure them with elastic bands
3. Place the plant under sunlight for 6 hours
4. Test both leaves for starch (Starch present - orange-brown to blue-black, starch not present - remains orange brown)

IV: Whether CO2 is present or not
DV: color change of iodine solution
CV: same plant, same duration of experiment, temperature, light intensity

# data[].attributes.body
Procedure:
1. Destarch the leaf
2.cut a shape into a piece of black paper
3. attach the black paper to the destarched leaf of the plant
4. position the plant in the sunlight and leave for 6 hours
5. do the starch test (if starch is present, solution will turn from orange brown to blue black, if not, it remains orange brown)

IV: light and without light
DV: color change of iodine solution (presence of starch or not)
CV: same plant, same duration of experiment, same temperature

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How does light intensity affect the rate of photosynthesis?

# data[].attributes.subject
How does light intensity affect the rate of photosynthesis?

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1. Using a spatula, measure 5g of sodium hydrogen carbonate on an electronic balance and transfer the powder to a 600m beaker.
2. Using a 100ml measuring cylinder, fill the beaker with 500ml of tap water and stir the mixture with a glass rod until the solute is completely dissolved
3. Cut a piece of Cambomba at one end and insert the cut end inside a small funnel
4. Fill a test tube with tap water to the top, carefully turn it upside down and fit it onto the tip of the funnel
5. Set the beaker 10cm away from the LED lamp
6. Turn on the lamp and start the stopwatch
7. Count the number of gas bubbes given out in 1 minute
8. Repeat steps 5 to 7 but with 40cm and 70cm away from the lamp

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Is chloroplast needed for photosynthesis?

# data[].attributes.subject
Is chloroplast needed for photosynthesis?

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1. Destarch a variegated plant – partly green and partly white
2. Make a drawing of the leaf
3. Place the plant in bright light for several hours.
4. Test the leaf for starch using the 4-step starch test.Make another drawing of the leaf.
5. In this drawing show the areas of the leaf that tested positive and those that tested negative for starch.

Results:
Only the areas that contained chloroplast (the green parts) will photosynthesise and therefore test positive for starch, showing that chloroplast is necessary for photosynthesis.

IV: light different parts of leaf
DV: colour of leave presence of starch or not/ colour change in iodine solution starch test
CV: temperature, co2 concentration, same type/specie of plant, same duration of experiment