Photosynthesis

Objective 2:The student will demonstrate an

understanding of living systems and theenvironment.

(7.8) Science concepts. The student knows that complex interactions occur between matter and energy. The student is expected to:

(B) identify that radiant energy from the Sun is transferred into chemical energy through the process of photosynthesis.

http://www.homestead-farm.net/art/kidsArt/photosynthesis-color.jpg

Photosynthesis

• Photosynthesis changes light energy into food (chemical) energy.

http://www.eia.doe.gov/kids/energyfacts/sources/renewable/images/photosynthesis1.gif

Photosynthesis

• Begins with (reactants):– Sunlight (radiant energy)

– Water (from the ground)

– Carbon dioxide (from the air)

Photosynthesis

• Ends with (products):– Oxygen

– Glucose• Stored chemical energy

http://curriculum.calstatela.edu/courses/builders/lessons/less/les4/les4gifs/glucose.gif

Photosynthesis

Reactants Products

CO2 + H2O + light C6H12O6 + O2

From the air

Water taken up by roots

Energy(sunlight

)

GlucoseEnergyFuel

Oxygen

http://www.tomatosphere.org/EngManual/images/photo_equation1.jpg