WARM UP 5 Min DNA Questions: Explain the difference between biotic & abiotic factors Energy flows through an ecosystem in ______ direction(s) :

“Ecological Pyramids” Ch. 3 Sec 2 Notes “Ecological Pyramids”

Learning Objectives 2 Min explain how an energy pyramid shows the energy transferred and lost in an ecosystem. identify the trophic levels in an ecological pyramid. distinguish between the 3 types of ecological pyramids.

Energy Pyramid 2 Min Illustrates how stored energy is passed from one organism to another 0.1% Third-level consumers 1% Second-level consumers 10% First-level consumers 100% Producers

Energy Pyramid continued… 2 Min Energy Transferred typically only 10 percent of energy from the previous level is passed on to the consumer Energy Lost At every level in a food web, an organism uses energy metabolically to survive and grow, but much is released as heat about 90 percent

Energy Pyramid cont… 2 Min

Test Your Knowledge! In an energy pyramid… 30 sec In an energy pyramid… How much energy is lost at each level? 10% of energy is _____ to the next trophic level when the lion consumes the zebra.

Trophic Levels 2 Min

Trophic Levels Wild! In the pyramid the top level consumer is the ___ 30 sec In the pyramid the top level consumer is the ___ primary producer is ____ secondary consumer is ____

Biomass Pyramid 2 Min

Pyramid of Numbers 2 Min Shows the relative number of individual organisms at each trophic level.

Name that Pyramid… Shows 50 grams of platypus/meter2 30 sec Shows 50 grams of platypus/meter2 Shows only 10% of energy is transferred from grass to the bunny that eats it Shows that 1 great white shark eats 20 seals

Food Webs These show who eats who. There are simple ones and complex ones. This is a  A complex one is on the wall.

Ch. 3 Sec 2 Summary Take a moment to reflect on what you learned today 5 Min Take a moment to reflect on what you learned today You have 5 minutes to write a summary. Use your learning objectives to help you.

Ch. 3 Sec 2 Reflection Glue into notebook 15 Min Glue into notebook Use your notes, & the textbook to help you answer the questions You have 15 - 20 minutes to complete the Reflection review.