1. Interactions of Life

2. What is a biosphere?
A biosphere is the part of Earth that supports life.
Consists of:
top portion of the Earth’s crust
all waters that cover the Earth’s surface
atmosphere that surrounds Earth
Biosphere Egg – developed by Nasa
Perfectly ecologically balanced mix of plant, algae and animal life surviving with daily input of light only.

3. Ecology: study of interactions that occur among organisms and their environment.

4. An ecosystem consists of:
All the organisms living in an area
All of the nonliving features in their environment
ALL biotic factors
ALL abiotic factors

5. Organism Population Community Ecosystem
(same kind of organism)
Community
(populations of several organisms)
Ecosystem
All biotic and abiotic factors

6. What is a habitat?
The place in which an organism lives