What do seeds need to grow?
Using scissors punch a hole in the bottom of each cup.
Cup 1 (No water): Add soil and seeds. Cover the cup
with plastic wrap water cannot get in.
Cup 2 (No soil): Add cotton, water and seeds. Leave
the cup uncovered
Cup 3 (No light): Add soil, water and seeds. Cover
with foil to block out all light.
Cup 4 (Control): Add soil, water and seeds. Leave the
cup uncovered.
Chemical Energy and ATP
NADPH is a molecule that has a
similar function to ATP
• NADPH contains chemical
energy.
• When the cell uses the energy,
NADPH is converted into NADP+
• Energy from sunlight is
necessary to convert NAPD+
back into NADPH
NADP+/NADPH
A closer look at the conversion of
NADP + to NADPH
Chemical Energy and ATP
How could a small seed gain
enough energy to grow into a
giant tree?
Autotroph – uses energy
from the sun to produce food
Heterotroph – obtains energy
from food it consumes
Chemical Energy and ATP
Light and Pigments
Overall Photosynthesis Equation
6CO2 + 6H2O
Carbon
Dioxide
Water
LIGHT
C6H12O6 + 6O2
Glucose
Oxygen
Photosynthesis: the process where plants convert solar
energy from the sun into chemical energy stored in the
bonds of carbohydrates.