1. Unit 3: How Living Things Interact
Mr. Ross Brown
Brooklyn School for Law and Technology

2. How do living things interact?
Farmers used DDT to kill insects that ate their crops
DDT weakened falcon egg shells
DDT was banned
Ecology: the study of the environment

3. How do living things interact?
Biotic factors: living
Animals, plants, fungi, and their wastes
Categorized (kingdom, etc.)
Abiotic factors: non-living
Rocks and minerals, sunlight, temperature, wind,

4. What are the components of an ecosystem?
3 March 2016
Do now: Explain how ecosystems reuse matter.

5. What are the components of an ecosystem?
Biotic and abiotic factors are parts of ecosystems
Coral reef, desert, forest, puppy, rotting log, eagle, infant, mountain

6. What are the components of an ecosystem?
Levels of Interaction

7. What are the components of an ecosystem?
Levels of Interaction
Individual organism
Population
Community
Ecosystem
Biosphere

8. What are the components of an ecosystem?
Population: all members of one species living in the same area
Community: a group of different populations that live and interact in the same area
Ecosystem: all the living and non-living things found in an area
Biosphere: All of Earth’s ecosystems

9. What are the components of an ecosystem?
Role of ecosystems
Transfer energy among organisms
Move matter through the ecosystem
Matter: anything that has mass and takes up space
Food, fuel, energy for activities, like reproduction

10. What are the components of an ecosystem?
Moving energy through cellular respiration
Mixing oxygen and nutrients
Occurs at the molecular level

11. What are the components of an ecosystem?
Recycling matter
Carbon in tree can decompose into carbon as food for crops and the become carbon as part of your body
Recycle: to use the same matter in different forms

12. Homework 4, part 2
3 March 2016
Why is the biosphere considered the highest level of interaction in the environment?