4th grade-ch. 3 lesson 3 how does matter flow in ecosystems
Post on 15-Dec-2014
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Ch. 3 Lesson 3How Does Matter
Flow in Ecosystems?
•¾ of Earth’s surface- covered w/ water
•different kinds of water different kinds of water ecosystems= different ecosystems= different kinds of animalskinds of animals–ex:ex:
1. wetlands 1. wetlands
(swamps, Everglades)(swamps, Everglades)
2. oceans 2. oceans
(coral reefs, deep sea)(coral reefs, deep sea)
algae• single celled
• carry out photosynthesis
• producers
food web• shows how food chains are
connected
Everglades food web
decay in ecosystems1. scavengers
• feed on dead organisms
• ex: insects
2. decomposers
• ex: fungi & bacteria
• break down dead
organisms & return
nutrients to ground
• decomposers use oxygen to break down food release carbon dioxide into air
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