 Warm-up: (9-22-15)
*Ch.3-1 video notes/rubric out for stamp!
• 1. Give 2 pros and 2 cons for using synthetic fertilizer and organic fertilizer.
• 2. Contrast crop rotation and strip cropping.
• 3. Contrast terracing with contour farming.
• *copy hw from the board.
 Q/A
 What is interdependence?
 Which of the 4 spheres of Earth makes up the crust and upper mantle?
 Which sphere is the gas layer?
 Which sphere is made up of water?
 Which sphere is made up of all of the ecosystems and living things?
 A greater variety of species describes the _____ of the area.
 T/F. Biodiversity tends to be greater in ecotones.
 Give one example of an abiotic factor.
 In a pond, the interactions between the plants, fish, bacteria, turtles, algae, would describe which level of ecology?
 If you were researching the density or distribution of a specific species of turtle, which level of ecology would you be describing?
 What is the difference between an ecosystem and a community?
 Ch.3-3
 Mrs. Boyd
 “auto” means …
 “troph” means…
 Autotroph means…
 Producers
 Producers: Autotrophs. Organisms that make their own food through photosynthesis or chemosynthesis.
 Photosynthesis: use sun’s energy to make food.
 Chemosynthesis: use energy stored in chemical to make food.
 Name the plant organelle involved in photosynthesis.
 Do animal cells have this organelle?
 Fungi?
 Consumers
 Consumers: heterotrophs. Organisms that can’t make their own food so they have to consume organic molecules made by other organisms.
 Include:
 Herbivores, carnivores, omnivores, detrivores
 How do autotrophs and heterotrophs differ?
 Herbivores: eat producers.
 Primary consumers
 Teeth designed for grinding
 Ex. Rabbits, cows
 Carnivores: eat consumers.
 Secondary consumers
 Feed on primary consumers (herbivores)
 Teeth designed for tearing (large canines and sharp molars) cats for example
 Ex. Lions eats a zebra that eats grass
 Omnivores: eat both producers and consumers.
 Ex. Grizzly bear: eats both salmon and berries.
 Tertiary consumer
 Ex. Shark eats a fish that ate another fish that ate plankton.
 Give one example of an herbivore.
 Give one example of a carnivore.

 Give one example of an omnivore.
 Detrivores: feed on parts of dead organisms in an ecosystem.
 Recently dead organisms
 Scavengers – feed on dead organism they did not kill, but found dead
 Ex. Vultures, hyenas
 Decomposers: bacteria and fungi that break down dead tissue or waste into simpler molecules.
 Biodegradable means can be broken down by decomposers
 Why are detrivores and decomposers important to any ecosystem?
 Food chains to food webs
 Food chain: single pathway of feeding relationships (energy transfers) among organisms in an ecosystem.
 Ex. Grass mouse eats grass seeds
snake
hawk
 Food web: interrelated food chains in an ecosystem. (arrow points in the direction that energy is transferred)
 Check for Understanding:
 1. Contrast population and community.
 2. Give an example of a detrivore and an example of a decomposer.
 3. What does the ringed seal eat?