Zusammenfassung der Ressource
photosynthesis
- what is photosynthesis?
- photosynthesis carries out three very
important functions for the continued
existence of life on earth:
- photosynthesis results in plants
giving off oxygen which is essential
for many living organisms
- photosynthesis removes carbon
dioxide from the air and prevents it
from reaching a poisonous level
- photosynthesis provides food for
most living organisms on the
earth
- photosynthesis is the
way plants make their
own food using light
- photo - light
- synthesis -
produce/make
- equations:
- word: carbon dioxide + water -------> glucose + oxygen
- chemical: 6CO2 + 6H2O ---------> C6H12O2 +6O2
- how do plants
photosynthesise
- for photosynthesis to
take place:
- 1. plants take the carbon
dioxide from the air through
tiny pores on their leaves
called stomata
- 2. plants take in
water from soil
through their roots
- 3. sunlight is absorbed by the
chloroplasts in the cells of the
leaves of the plant
- 4. the green pigment chlorophyll in
the chloroplasts allows the carbon
dioxide and water to combine to
form glucose
- 5. the energy for this
reaction comes from
sunlight
- 6. oxygen is released
and given off as a
waste product
- photosynthesis as a
chemical process
- that may be described as a process because it
involves a number of steps
- it is a chemical process because
it happens in living cells
- photosynthesis as a
biological process
- photosynthesis occurs in the
chloroplasts of living cells
- it is a biological process
because it happens in
living cells
- factors that
affect
photosynthesis
- carbon dioxide
- temperature
- light