1. Remember Ecosystem, Habitat and Niche?
Ecosystem – group of communities
interacting with each other and the
nonliving parts of their environment
Habitat – Place where an organism lives
Niche – organisms role or job, in its
habitat, often associated with what it
eats.

2. How do organisms interact with their environment?

3. Producers and Consumers
Producers make their own food usually by a process called photosynthesis.
Consumers obtain food by eating other organisms

4. Food Chain Producer Primary consumer
At each level, only about 10 % of the energy that is produced is passed on
Secondary Consumer

5. Energy is lost in heat and carrying out life processes
Trophic Levels
Energy is lost in heat and carrying out life processes
In each link of the food chain, only 10% of the energy in the food is transferred to the next level!!
What happens to the
Other 90%?

6. Food Chain

8. Food Web Organisms can eat more than one thing Arrows point to where the energy is going!