Photosynthesis & Energy

PLANTS also known as Producers – Autotrophs make their own food through PHOTOSYNTHESIS

6H 2 O + 6CO 2  C 6 H 12 O 6 + 6O 2 Reactants  products Plants use reactants to make sugar for energy and growth Conservation of mass: reactants are not destroyed, just change form

Plants get…. Water from the soil through roots & CO2 from the air through leaves to make glucose

Check yer understanding…. Plants are called producers…why? Where do producers get their energy from? What is a synonym for producer? What are the REACTANTS in photosynthesis? What are the PRODUCTS in photosynthesis? Where do plants get water from? What sugar do plants make? What is the chemical formula for glucose?

ATP (Adenosine triphosphate) is the energy used by living cells

ATP three phosphates bound together P~P~PP~P~P Energy is stored in the bonds

When a phosphate is lost a great amount of energy is released and becomes ADP (adenosine diphosphate)

ATP releases P = ADP ATP is like a rechargeable battery ADP is like a dead battery

Check yer understanding…. What is your cell’s “energy molecule” called? Where is the energy in ATP stored? What is the ultimate source of all energy on earth? How is ATP’s energy released?

Photosynthesis is Production of chemical energy (ATP) from light energy

Photosynthesis takes place in chloroplasts containing pigment chlorophyll

Photosynthesis Has 2 reactions One requires light One does not require light

Light dependent rxns makes ATP in thylakoid membrane ATP goes to the Light independent (dark) rxns to make sugar in the stroma

Check yer understanding…. In what organelle does photosynthesis take place? What are the two reactions of photosynthesis called? In what reaction is ATP MADE? In what reaction is ATP BROKEN DOWN In what reaction is sugar MADE?