1 Review What is ATP and what is its role in the cell” Explain How does the structure of ATP make it an

ideal source of energy for the cell Use Analogies Explain how ADP and ATP are each like

a battery. Which one is partially charged and which one is fully charged- why?

2 Review What is the ultimate source of energy for plants

Explain How do heterotrophs obtain energy? How is this different from autotrophs?

3 Interdependence Recall that energy flows and nutrient cycles through the biosphere. How does the process of photosynthesis impact both the flow of energy and the cycling of nutrients?

CH 8 PHOTOSYNTHESIS8.1 Energy and Life

Chemical Energy

Energy The ability to do work

Your cells are always working- building, contracting, transporting

If you can’t get and use energy you die.

ATP

Adenosine TriPhosphate Small usable packet of energy Your body/cells use whenever they need energy for

various functions High Energy.

ADP

Adenosine DiPhosphate Two phosphate molecules Used up version of ATP Low energy Can be turned back into ATP by adding a

phosphate and energy to hook it back on.

Storing Energy Cells store small amounts

of energy by adding a phosphate to ADP

Cells release small amounts of energy by removing the third phosphate of ATP

ATP and ADP are like a rechargeable batteries.

Using Biochemical Energy

Storing Energy ATP isn’t good at long

term energy storage Only small amounts are

kept ATP can be regenerated

by using energy in glucose.

Heterotrophs Obtain food by consuming other living things

Autotrophs Organisms that make their own food

Photosynthesis Process of autotrophs of converting light energy into

chemical energy.