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1
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2
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- The process of photosynthesis is a chemical reaction.
- It is the most important
- chemical reaction on our planet.
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3
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4
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5
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6
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7
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- The process of changing light energy to chemical energy
- Energy stored as sugar
- Occurs in plants and some algae
- Plants need light energy, CO2, and H2O
- Takes place in the chloroplasts, using chlorophyll, the green pigment in
plants
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8
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9
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- Plants capture light energy and use that energy to make glucose
- Sunlight provides the energy needed by chlorophyll to change molecules
of carbon dioxide and water into glucose
- Oxygen is also released in this
reaction
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10
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- Carbon dioxide enters the leaf through holes called stomata
- CO2 combines with the stored energy in the chloroplasts
through a chemical reaction to make glucose
- The sugar is moved through tubes in the leaf to the roots, stems and
fruits of the plants
- Some of the sugar is used right away by the plant for energy; some is
stored as starch; and some is built into plant tissue
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11
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12
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- We cannot make our own food (glucose, energy), we must get our food from
plants.
- Plants are the first step in the food chain.
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13
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- The oxygen released during photosynthesis is necessary for all living
things.
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14
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- http://www.ftexploring.com/me/photosyn1.html
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15
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16
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- The release of chemical energy for use by cells.
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17
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- Once the energy that was in sunlight is changed into chemical energy by photosynthesis,
an organism has to transform the chemical energy into a a form that can
be used by the organism.
- This process is cellular respiration.
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18
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19
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- The breakdown of glucose molecules to release energy
- Takes place in all living things
- Is a step by step process
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20
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21
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22
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- http://www.usoe.k12.ut.us/curr/science/sciber00/8th/energy/sciber/photosyn.htm
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Notes
