PHOTOSYNTHESIS

TEXT BOOK PAGES 86-90

What do these cells have in What do these cells have in common?common?

• BOTH muscle and plant cells need energy to live.– Muscle cells need energy to help you move – plant cells need energy to perform life functions

like making food, and cell reproduction.

• How they get their energy is DIFFERENT!– Plants use the chloroplasts in their cells to

make most of their energy– Animals use the mitochondria in their cells

to make all of their energy

Skeletal muscle cellsPlant cells

How do these cells get energy?How do these cells get energy?

• Animals get energy from: _____________• Plants get energy from: ______________• A major source of energy for most cells

is stored in a molecule of sugar called GLUCOSE– Plants use the sun to make glucose– Animals eat glucose

PLANTS – SOURCE OF ENERGY PLANTS – SOURCE OF ENERGY IS SUNLIGHTIS SUNLIGHT

• What is an autotroph?What is an autotroph?• What is a heterotroph?What is a heterotroph?• Who are the Who are the

heterotrophs in this heterotrophs in this picture? picture?

• Plants make their own Plants make their own food through the food through the process of process of photosynthesisphotosynthesis

• They are known as They are known as AUTOTROPHS (grass)AUTOTROPHS (grass)

PHOTOTSYNTHESIS• Process where a plant’s cells

change the energy from the sun in to chemical energy.

• Takes place in cells that have the chloroplasts.

• Chloroplasts contain chlorophyll: a pigment that traps the energy in the sunlight.

PHOTOSYNTHESISSTARTING MATERIALS THE PROCESS THE PRODUCTS

Carbon Dioxide (CO2)from the air

Water from the soil

Carbon Dioxide enters through the STOMATA and water enters through the ROOTS and moves upward. They move to the leaf and its chloroplasts. The chlorophyll captures the energy from the sun and its used to change the CO2 and H2O to new products.

Oxygen and sugars like GLUCOSE are made. Plant releases oxygen to the air and uses the sugars for energy.

The EQUATION

6H20 + 6CO2 LIGHT ENERGY C6H12O6 + 6O2

The Photosynthesis Song!!!!

• http://www.youtube.com/watch?v=tSHmwIZ9FNw

Photosynthesis is Essential for the Air

YOU Breathe• 21% of the atmosphere is

Oxygen, thanks to plants, algae, and some bacteria.

• The levels of oxygen remain balanced in the atmosphere– Plants makes O2 for the animals

during photosynthesis – Animals make CO2 for the plants

during a process called respiration