ECOLOGYPlants and animals depend on each other and their physical environment.

OBJECTIVE

Describe the flow of energy and matter through food chains and food webs.

ENERGY FLOW THROUGH ECOSYSTEMS Energy flows

through ecosystems in one direction

Energy flows from the Sun to Producers to Consumers to Decomposers

ENERGY FLOW THROUGH ECOSYSTEMS

ENERGY FLOW THROUGH ECOSYSTEMS

process may be visualized with food chains

ENERGY FLOW THROUGH ECOSYSTEMS process may be visualized with energy

pyramids.

FOOD WEBS

Food webs identify feeding relationships among producers, consumers, and decomposers in an ecosystem.

MATTER CYCLES

Matter is transferred from one organism to another and between organisms and their physical environment.

WATER CYCLE

CARBON AND OXYGEN CYCLE IN PS.

CARBON CYCLE

NITROGEN CYCLE

OBJECTIVE

Provide evidence that green plants make food and explain the significance of this process to other organisms

PHOTOSYNTHESIS

the Sun’s energy is converted into and stored as chemical energy in the form of a sugar.

PHOTOSYNTHESIS

Photosynthesis is carried on by green plants and other organisms containing chlorophyll.

Chlorophyll Molecule (found inside the chloroplasts)

Moss Chloroplasts

PHOTOSYNTHESIS

The quantity of sugar molecules increases in green plants as sunlight increases

OXYGEN AND CARBON DIOXIDE

The major source of atmospheric oxygen is photosynthesis.

OXYGEN AND CARBON DIOXIDE Carbon dioxide is removed from the

atmosphere and oxygen is released during photosynthesis.

PRODUCERS Green plants are the

producers of food which is used directly or indirectly by consumers

PRODUCERS

Green plants are the producers of food which is used directly or indirectly by consumers