PhotosynthesisPhotosynthesis- A process by which plants convert sunlight, water, and carbon dioxide into food energy (sugar), oxygen and water.

ChloroplastChloroplast- An elongated cell organelle containing chlorophyll where photosynthesis takes place.

ChlorophyllChlorophyll- A green molecule which uses light energy from sunlight to change water and carbon dioxide gas into sugar and oxygen

H20 + CO2 + light O2 + glucose

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Chlorophyll is the green pigment

inside the chloroplasts of plant cells that makes leaves

green!

CO2CO2

SugarSugar + O + O22

OO22

RespirationRespiration- The process by which the chemical energy of "food" molecules is released and changed into ATP.

MitochondriaMitochondria- Rod-shaped organelles with a double membrane which converts the energy stored in glucose into ATP for the cell.

O2 + glucose H20 + CO2 + ATP

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Do you notice something Do you notice something about this equation?about this equation?

Animals use: Sugar (from producers/plants) Oxygen (from producers/plants)

Plants use: Carbon dioxide (from animals)

O2

O2

O2

O2

O2

Photosynthesis Equation:H2O + CO2 + lightlight O2 + glucose

Respiration Equation:O2 + glucose H2O + CO2 + ATPATP

What about What about light light && ATP? ATP?

The Law of Conservation of Energy says…

1.) Energy cannot be created2.) Energy cannot be destroyed

Therefore…energy can only be transformed into other types of

energy.

In photosynthesis:Electromagnetic energy (sun) Chemical Energy (sugar)

In respiration:Chemical energy (sugar) Different type of Chem. Energy (ATP)

ATP- Adenosine triphosphate A high energy molecule that serves as

the energy currency of the cell

ATP

We will visit ATP again in

a few weeks during

our CELL UNIT!