Quick Write What is your favorite meal? (List what is in the food. Which meat, plants, etc..)

Energy Flow & Trophic levels

Energy flow in ecosystems Producers – a photosynthetic or chemosynthetic autotroph that serves as the basic food source in an ecosystem

Energy flow in ecosystems Consumers – an organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources

Energy flow in ecosystems Consumers – an organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources

Energy flow in ecosystems Consumers – an organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources

Energy flow in ecosystems Decomposers – an organism that feeds by breaking down organic matter from dead organisms

Food chain Food chain – the energy flow from one trophic level to the next Trophic level - one of the steps in a food chain or food pyramid Draw a food chain!

Food chain Herbivore – an organisms that eats plants Carnivore – an organism that eats other animals Omnivore – an organism that eats both plants and animals

Food web

10% rule Only 10% of the energy consumed is stored 100 kg lion needs 1,000 kg of zebras The 1000 kg of zebras need 10,000 kg of plants

Energy pyramid

Energy pyramid Energy pyramid – a triangular diagram that shows an ecosystem’s loss of energy, which results as energy passes through the ecosystem’s food chain Complete your pyramid:

Populations Population – a group of organisms of the same species that live in a specific geographical area and interbreed

Population growth Exponential growth – occurs when numbers increase by a certain factor each successive period J - Shaped Logistic growth – a population that starts with a minimum number and reaches a maximum depending on the carrying capacity of the habitat S - shaped

Exponential growth J - Shaped Draw the growth curve:

Logistic growth S - shaped Draw the growth curve:

Carrying capacity Carrying capacity – the largest population that an environment can support at any given time

Logistic growth S - shaped Draw the growth curve:

Exponential growth

Exponential growth

Exponential growth

Factors for carrying capacity Biotic factors – Food Predators Diseases and parasites Humans Abiotic factors – Weather Climate Water

Dead stuff: The secret ingredient in our food chain https://www.youtube.com/watch?v=KI7u_pcfAQE

Food web poster Students will work in pairs to complete a food web poster Students will research the animals, plants, and insects of a biome Students will create a Food Web poster Food Web Posters will show who eats what in the biome

Return to seats When transitioning back to seats Expectations include: Quietly walk to your seat only AFTER being told to Quickly get ready for the next activity Students will stay in their seats until allowed to leave by the teacher

Wolves http://www.youtube.com/watch?v=ysa5OBhXz-Q#t=250

A guide to the energy of the Earth https://www.youtube.com/watch?v=fHztd6k5ZXY