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Download Energy Flow PPT Guided Notes Intro Questions?
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Name:______________________________ Energy Flow PPT Guided Notes Date: _________ Class: _______ Seat # ___ Intro Questions? What do all living things need? Food, water, shelter, oxygen, etc. Even if you have all this, what is necessary to use it? ENERGY You will learn about the ENERGY FLOW IN ECOSYSTEM How does energy flow in an ecosystem? What is an energy pyramid? What is a trophic level? ENERGY ENTERS ECOSYTEM- All energy in ecosystem comes from_________________ First law of Thermodynamics: Energy cannot be created or destroyed (but it can be _________________into stored energy & heat) ENERGY LEAVES ECOSYSTEM Second law of thermodynamics: Energy is______________ as energy is transformed In an ecosystem, when energy is transformed, some energy is lost as ______________. ENERGY PATHS: 3 ways to illustrate energy flow 1. _____________________- single path 2. ______________________- many paths 3. _______________________ FOOD CHAINS A food chain shows the __________________________ from one organism to the next • energy flows from ____________________ to consumers • arrows point to _____________________________ (plant is eaten by herbivore) • Usually ___________________________ are left out FOOD WEBS A ______________________ shows all feeding relationships in an ecosystem (made of many _____________________) Food Webs (fill in and draw arrows) Typically, food webs go like this: Remember: _______________ receive energy from _____ other _____________in an ecosystem FOOD CHAINS and WEBS: Practice Food Chains/Webs & Energy Pyramids Food chains/webs can be written as a __________________: • ____________________ form the base of the pyramid • _____________________ form the upper layers ENERGY PYRAMIDS The energy pyramid shows energy flow in an ecosystem: • A level of the energy pyramid is called a ______________________. • Each trophic level represents the ______________for those organisms TROPHIC LEVELS Energy is lost with each trophic ~_______ is ______________to the environment as heat ~_______of the energy is ____________ QUICK REVIEW Practice! Only about _______ of the energy from ____________ is passed on to the ________ If 100% of the energy is available at the first trophic level, what percentages of the energy are available at the second and third trophic levels? QUICK REVIEW! All organisms in an ecosystem need _______________ from food to live. An energy ______________ shows how much food energy is passed from one _________________ to another through food chains. _________________ have the largest spot at the base of the pyramid. Altogether, only about __________ of the food energy at each level gets passed up to the next level.
