1. Chapter 4
Ecology

2. Photosynthesis vs. Respiration
Respiration - occurs in mitochondria, uses glucose and oxygen to produce water, energy (ATP), and carbon dioxide
Photosynthesis - occurs only in plants in the chloroplast, uses sunlight (energy), carbon dioxide, and water to make glucose and oxygen

3. Food Relationships Producer - makes their own food (Autotroph)
Consumer - must find and eat food (Heterotroph)
Decomposer - break down dead organisms
Food Chain - shows “what eats what”

4. Food relationships
Food Web - shows all the feeding relationships in an ecosystem
Food Pyramid - shows the movement of energy as it moves up the food chain or food web
1. biomass
2. energy

5. Diets Carnivore - eats only animals Herbivore - eats only plants
Omnivore - eats both plants and animals
Predator - eats the prey
Prey - must survive the predator

6. Ecological Succession
The natural progression leading to a stable forest ecosystem

7. Human Impact Water Pollution - biomagnification, fertilizer, run-off
Land Pollution - garbage dumps, poor land use
Air Pollution - smog, burning fossil fuels, acid rain
Thermal Pollution - increased water temperatures
Ozone Layer - damaged by aerosols
Global Warming - caused by green house gasses (CO2)
Overpopulation - leads to death in the food chain