1. Interactions of Life

2. Warmup What is the smallest ecosystem you can think of?
What is the largest ecosystem you can think of?
Look around the room and identify all of the ecosystems.

3. 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.

4. Ecology: study of interactions that occur among organisms and their environment.
What is an ecosystem?
1. Without using your book, in your jpurnal make a quick list of the components (parts) of an
ecosystemI
2. Pair with your table partner and share your list.

5. 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

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

7. What is a habitat? The place in which an organism lives beaver habitat
giraffe habitat
polar bear habitat
sea lion habitat

8. 1. What is the biosphere? (List all the components)
2. What is ecology?
3. How are the terms habitat and biosphere related to each other?
4. What is the major difference between a community and a population? Give at least one example of each.
5. Does the amount of rain that falls in an area determine which kinds of organisms can live there? Why or why not? Give examples to support your answer.