Bell work Week 33 Biosphere part of Earth

Bell work Week 33 Biosphere: part of Earth in which life exists including land, water, and air atmosphere. Ecosystem: collection of all the organisms that live in a particular place, together with their nonliving environment. Population: group of individuals of the same species that live in the same area Species: group of similar organisms that can breed and produce fertile offspring. Community: assemblage of different populations that live together in a defined area.

Title of Notes: food chain/web pg. 33 & 34 RS Goal for lesson: write on self assessment worksheet I can example the difference between a food chain and food web.

Food Chains A hierarchical series of organisms each dependent on the next as a source of food. .

Food Web A system of interlocking and interdependent food chains. Trophic Levels: a step in the food chain or food web.

Primary Consumers: Primary consumers eat the Producers! Cows Giraffe Critters that eat plants… Deer Some Bugs

Secondary Consumers: Secondary consumers eat the Primary consumers and sometimes they can also eat the Producers! Tigers… Humans are an example of Omnivores!!! Lions… ***Critters that can eat both producers and consumers are called “Omnivores” And Bears… Oh my!!!

Food Webs Food webs show energy flows through an ecosystem. Food webs have symbols/pictures that represent each level of an ecosystem. Arrows between symbols (organisms) show the flow of energy through an ecosystem. Energy starts here Energy ends up here

Energy Flow Energy flows through an ecosystem in one direction: Sun Autotrophs (Producers) Heterotrophs (consumers) Sunlight is the main energy source for life on Earth. Some organisms rely on energy stored in inorganic chemical compounds like mineral water that flows underground or boils out of hot springs and undersea vents.

Parts of a food web… All proper food webs begin with the sun The arrows show the flow of energy from one organism to another There are pictures or names to represent each organism and level of the food web

Draw and label this food web on pg. 33 LS Producers Primary consumers Tertiary consumer Secondary consumers

Food Energy Pyramid: Energy pyramids show the balance of organisms in a healthy ecosystem Predators keep the number of primary consumers under control If there were too many herbivores, they would quickly eat all the producers There has too be enough producers to supply everything else with enough energy

Food Energy Pyramid: Draw the pyramid and labels on pg. 34 LS Consumer Level 3 10% Consumer Level 2 10% Plants Level 1