1. (7th) Chapter 4-1 Cornell Notes
Photosynthesis

2. Chapter 4-1: Key Questions:
How does the sun supply living things with the energy they need?
Answer 1: _________________________________________
What happens during the process of photosynthesis?

3. Chapter 4-1: Key Terms photosynthesis- autotroph- heterotroph-
pigment-
chlorophyll-
stomata-

4. Chapter 4-1 Part 1 Sun source of E for most living things;
all cells need E;
photosynthesis: the cell process where the sun’s E is used to make food.

5. Chapter 4-1 Part 2
nearly all living things get E directly/indirectly through photosynthesis;
autotroph: uses Sun’s E to make food;
heterotroph: cannot make its own food.

6. Chapter 4-1 Part 3
photosynthesis: carbon dioxide + water with light = sugars + oxygen;
Stage 2: produce sugars.
Stage 1: capture Sun’s E;

7. Chapter 4-1 Part 3 (continued)
Stage 1 occurs mostly in leaves;
chloroplasts: give plants green color;
pigment: colored compounds that gives color;
chlorophyll: main photosynthetic pigment in cells;
chlorophyll: gets light E and uses it for Stage 2;
cell needs 2 raw materials: CO2 + H2O;
H2O comes in by roots and CO2 by stomata in leaves.

8. Chapter 4-1 Part 4
in chloroplasts, H2O + CO2 creates sugar and O2 through chemical reactions;
plants use sugar for food, make other compounds or stored;
O2 leaves cells through stomata;
almost all O2 in air made through photosynthesis;
6CO2 + 6H2O = C6H12O6 + 6CO2.