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photosynthesis and the rate and ideal conditions (photosynthesis products…
photosynthesis and the rate and ideal conditions
photosynthesis products glucose using light
4) photosynthesis is endothermic this means energy is transfer from the environment in the process
5)the world equation for photosynthesis is
3) energy is transfer to the chloroplasts from environment by light
carbon dioxide =water ---->glucose+oxygen
2)it takes a place in chloroplasts in green plant cells they contain pigments like chrophyll that absorb light
6) here's the symbol equation too
1)photosynthesis use energy to change carbon dioxide and water into glucose and oxygen
6co2 +6h20 ---> c6h12o6 +6o2
plants use glucose in five main ways
3) making amino acids glucose is combined with nitrate ions to make amino acid which are then made into proteins
4) store as oil or fats glucose is turned into lipids for storing in seeds
2) making cellulose glucose is converted into cellulose for making strong plant cell walls.
5) stored as starch glucose is turned into starch and stored in roots stems and leaves ready for use when photosynthesis isn't happening like in the winter starch is insoluble which makes it much better for storing than glucose
1)for respiration this transferred energy from glucose which enables the plant to convert the rest of the glucose into various other useful substances
rate of photosynthesis
chrolophyll can also be a limiting factor of photosynthesis
the amount of chlorophyll is a plant can be affected by disease or environmental stress such as lack of nutrients these are called chloroplasts to become damaged or to not make enough chlorophyll
these factors have combined effects on the ratio of photosynthesis but which factor is limiting at a particular time depends on the environmental conditions
in winter its often the temperature
if its warm enough and bright enough the amount of co2 is usually limiting
at night its pretty obvious that light is the limiting factor
any of these factors can become the limiting factor this just means that its stopping photosynthesis from happening any faster
light and rates of photosynthesis
beyond it it wont make a difference as light intensity increases the rate will no longer increase
in the lab you can change the light intensity by moving the lamp
as the light level is raised the rate of photosynthesis increase steadily but only up to a certain point
measure the light intensity at the plant using a light meter or do a bit of nifty maths with your results
light provides the energy needed for photosynthesis
oxygen production shows the rate of photosynthesis
3)at the end the syringe is used to draw gas bubbles in the tube
4)variables should be controlled the temperature and time the pondweed is left to photosynthesis
2)the pondweed is left to photosynthesis for a set amount of time as it photosynthesise the oxygen released will collect in the capillary tube
5)experiment is repeated twice the light source at the same distance and the mean volume of o2 produced is calculated
1) a source of white light is laced at a specific distance from the pondweed
6) then the whole experiment is repeated with the light source at different distances from the pondweed
inverse square law
4)the square means that if you halve the distance the light intensity will be four times greater and if you divide the distance by thee the light intensity will be nine time greater
5)if you double the distance the light intensity will be four times smaller and if you treble the distance the light intensity will be none times smaller
3) light intensity decreases in proportion to the square of the distance this is called the inverse square law .
6)you can use 1/d2 as a measure of light intensity.
2)you can say that as the distance increases the light intensity decreases
1) the lamp is moved away from the pondweed the amount of light that reaches the pondweed decreases
ideal conditions
4)farmers and gardeners can also increase the level of carbon dioxide in the green house
5)keeping plants enclosed in a greenhouse also makes it easier to keep them free from pests and diseases
3) light is always needed for photosynthesis so commercial farmers often supply artificial light after the sun goes down to give their plant more quality photosynthesis time.
6) costs money but if the conditions are just right it pays off
2)greenhouse helps to trap the sun heat and make sure that the temp doesn't become limiting in winter a farmer or gardener might use a heater as well to keep the temp at the ideal level;
1) the most common way to artificially create the ideal environment for plants is to grow in a greenhouse