SNC1P – Sustainable Ecosystems
Energy in Ecosystems:
Photosynthesis and Cellular Respiration
Key Terms and Ideas:
1. Photosynthesis stores energy. Cellular respiration releases energy.
2. Photosynthesis and cellular respiration balance each other.
Photosynthesis: a process in the cells of
plants, algae and some bacteria that
converts light energy from the sun into
stored chemical energy.
The chemical energy is stored in sugars,
one of which is glucose.
During photosynthesis, plants also produce oxygen gas.
Cellular respiration: a process in
the cells of most organisms that
converts the energy stored in
chemical compounds into usable
energy.
Living things use cellular
respiration to break apart the
sugars to release energy for life functions
.
During cellular respiration, living things produce carbon dioxide
gas and water vapour.
SNC1P – Sustainable Ecosystems
Photosynthesis and cellular respiration balance each other.
Energy
from the sun
Photosynthesis
(in plants)
used by
produces
Carbon dioxide
Water
Sugars (glucose)
Oxygen
produces
Cellular
Respiration
(in animals and
humans)
used by
SNC1P – Sustainable Ecosystems
Energy in Ecosystems:
Photosynthesis and Cellular Respiration
Key Terms and Ideas:
1. Photosynthesis stores energy. Cellular respiration releases energy.
2. Photosynthesis and cellular respiration balance each other.
Photosynthesis: a process in the cells of
plants, algae and some bacteria that
_________________________________
_________________________________.
The chemical energy is stored in
________________________________.
During photosynthesis, plants also produce _______________.
Cellular respiration: a process in
the cells of most organisms that
____________________________
____________________________
___________________________.
Living things use cellular
respiration to break apart the
sugars to _________________________________
.
During cellular respiration, living things produce ____________
___________________________________________________.
SNC1P – Sustainable Ecosystems
Photosynthesis and cellular respiration balance each other.
Photosynthesis
(in plants)
Cellular
Respiration
(in animals and
humans)
SNC1P – Sustainable Ecosystems