photosynthesis Flashcards
(16 cards)
word equation for photosynthesis
carbon dioxide + water ââ> glucose + oxygen
what type of reaction is photosynthesis
endothermic ( takes in energy )
symbol equation for photosynthesis
6CO<2 + 6H<2O âââ> C<6H<12O<6 + 6O<2
ââ-> = chlorophyll
limiting factors of photosynthesis
light intensity, temperature, concentration of CO<2
rate of photosynthesis practical
need:
pondweed
ruler
light source
gas syringe
water + sodium hydrogencarbonate
rate of oxygen produced =
volume / time
light intensity is proportional to
1 / distance ^2
flowering plants have two types of transport vessels
xylem , phloem
transpiration is
loss of water from the plant
stomata are
tiny pores on the surface of a plant
stomata allow
CO<2 and oxygen to diffuse directly in and out of a leaf
guard cells
change shape to control the size of the pore
when a guard cell is turgid (swollen with water )
the stomata is open
when a guard cell is flaccid ( low on water )
the stomata are closed
what environmental factors affect transpiration rate
light intensity - brighter the light , the greater the rate
temperature - warmer = faster rate
air flow - better air flow = greater rate
photosynthesis occurs in
chloroplasts
