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Photosynthesis - Coggle Diagram
Photosynthesis
Key words
Photosynthesis
The process by which plants make their
own food using light
Chlorophyll
Green pigment found in the chloroplast of
the plant cell
Chloroplast
Plant cell organelle where photosynthesis
occurs
Process
Involves a number of steps
Chemical
Process where new substances are formed
Biological
Refers to anything to do with living things
How do plants photosynthesise
Carbon dioxide is taken into the plant from the atmosphere through
stomata in the leaf.
Water is taken up from the soil through the roots.
Energy from sunlight is needed for the reaction. Sunlight is trapped in the
green pigment chlorophyll within the chloroplasts.
Carbon dioxide is converted to glucose.
Oxygen is formed and released from the plant as a waste product.
Factors affecting photosynthesis
A factor is anything (living or non-living) that affects something
else.
The following factors affect photosynthesis:
Light intensity
As light intensity increases, the rate
of photosynthesis increases until it eventually levels off (i.e. more light will not increase the rate of photosynthesis)
Carbon dioxide concentration
As the carbon dioxide concentration
increases, the rate of photosynthesis increases until it
eventually levels off.
Temperature
As temperature increases, the rate
of photosynthesis increases. When the temperature is too high,
enzymes are destroyed and photosynthesis stops.
Knowledge of photosynthesis and plant yields
Plant yield means how much food a plant will produce for a
grower.
Growers know the factors that affect photosynthesis and use this
to increase their plant yields.
Greenhouses raise temperatures to increase the rate of
photosynthesis.
Carbon dioxide can be added to greenhouses to increase crop
yields.
Artificial light can be used in greenhouses to increase
photosynthesis in shaded areas or even during the night.
How earth is dependant on it
Organisms need oxygen for survival.
Carbon dioxide levels in the atmosphere
need to be controlled.
Many organisms need food to live.
Photosynthesis as a biochemical process
Photosynthesis is a chemical process because it involves a number of steps and new substances are formed.
Photosynthesis is a biological process because it happens in living cells. Enzymes are present and are essential to the
process.
What is it
Photosynthesis is the process by which plants make their own food using
light.
Word equation
Carbon dioxide+water -------> glucose+oxygen
sunlight
Chlorophyll
Chemical Equation
6CO2 + 6H2O -----> C6H12O6 + 6O2