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Created by
Zara Faizi
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Cards (78)
Photosynthesis
word equation
Carbon Dioxide
+ Water >(light)>
Glucose
+
Oxygen
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Photosynthesis
symbol equation
6CO2 + 6H2O >(
light
)>
C6H12O6
+ 6O2
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where does photosynthesis take place?
in
chloroplasts
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What do cholorplasts contain?
chlorophyll
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Chlorophyll
A green pigment found in the
chloroplasts
of plants,
algae
, and some bacteria
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Is
photosynthesis
endothermic
or
exothermic
?
Endothermic - energy is transferred from the environment
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What 5 things is glucose used for in plants?
Respiration, making
cellulose
, making
amino acids
, stored as oils and fats, stored as starch
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What is cellulose used for?
plant cell walls
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how are amino acids made?
combining
glucose
and
nitrate ions
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glucose is turned into (s)
Starch
and stored in roots and stems
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glucose is turned into (l)
lipids
and stored as seeds
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Limiting factors of photosynthesis
light intensity
,carbon dioxide concentrationandtemperature
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When is light the limiting factor?
night time
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When is temperature the limiting factor?
winter
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when it's warm and bright enough, what's the limiting factor?
CO2
concentration
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what is the amount of chlorophyll affected by?
disease
or lack of nutrients
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why does lack of/damaged
chlorophyll
/
chloroplasts
affect
photosynthesis
?
can't absorb as much light
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not enough light
slows down
rate
of
photosynthesis
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too little carbon dioxide
slows down rate of
photosynthesis
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why does temperature affect the rate of photosynthesis?
it affects
enzymes
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when are the enzymes destroyed in plants?
45
degrees
celcius
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what can be used to measure the effect of light intensity on the rate of photosynthesis?
pondweed
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the more oxygen bubbles produced
the greater the rate of
photosynthesis
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What is the independent variable in the pondweed experiment?
distance of lamp
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Sodium hydrogencarbonate dissolved in water
can be used to measure effect of
CO2
on photosynthesis
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what does the inverse square law link?
Light intensity
and
distance
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light intensity is------------to distance
inversely proportional
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light intensity
=
1/
distance
^2
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what is the light intensity when the distance from lamp is 10cm?
1/100 =
0.01
a.u
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a.u
arbitrary units
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how do greenhouses ensure temperature is not a limiting factor?
trap the
sun's heat
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what do greenhouses use in winter?
heaters
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how can greenhouses be kept cool?
shade and
ventilation
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how to ensure light is not a limiting factor?
artificial
UV light
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how to increase CO2 concentration?
paraffin heater
makes CO2 as by-product
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what are the benefits of keeping plants enclosed?
free from
disease
and
pests
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fertilisers
provide
minerals
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respiration
the process of transferring energy from
glucose
which occurs in every
cell
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what type of reaction is respiration?
exothermic
- it transfers energy
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aerobic respiration word equation
glucose
+
oxygen
>
carbon dioxide
+
water
(energy is transferred)
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