Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Wednesday, November 9th MS-LS2-3 Develop a model to describe the cycling of matter and flow of energy among living and nonliving parts of an ecosystem. Entry Task: What is evaporation? Big Idea: How matter flows through different parts of an ecosystem Daily Target: I can create a model to describe the cycling of matter through living and nonliving parts of an ecosystem. Assignments: Cycles of Matter Worksheet (11/28) Conference Forms (11/15) Energy Mini-Books (11/10) Height vs. Arm Span (11/16) Conclusion: When can organisms use nitrogen? Plan for Today: Cycles of Matter Worksheet Vocabulary: Water Cycle Nitrogen Fixation Habitats Genes Organism Population Community Ecosystem Species Limiting factor Commensalism Parasitism Mutualism Competition Symbiotic Immigration Emigration Evaporation Condensation Decomposers Carnivore Herbivore Omnivore Mechanical energy Thermal energy Nuclear energy Chemical energy Producer Consumer Photosynthesis Direct observation Mark and Recapture Indirect observation Sampling Carrying capacity Niche Population density THE WATER CYCLE • The processes of evaporation, condensation, and precipitation make up the water cycle. • Evaporation: Liquid water is changed into a gas • Liquid water evaporates from oceans, lakes, and other surfaces and forms water vapor, a gas, in the atmosphere. • The energy for evaporations comes from the heat of the sun. • What living things can give off water? Plants? Can you? • Condensation: Gas changes into a liquid • When the water vapor rises higher in the atmosphere, it cools down, and turns back into tiny drops of water • Precipitation: Rain, snow, sleet, or hail. • These fall from the sky and provide our soils with water. THE CARBON AND OXYGEN CYCLE • Most organisms use oxygen for their life processes ecosystems, the process by which carbon and oxygen recycled are linked. Producers, consumers, and decomposers play roles in recycling carbon and oxygen. • The Carbon Cycle: Producers take in carbon dioxide from the air during photosynthesis. • They can then use carbon form carbon dioxide to make food molecules. • Plants use the carbon from carbon dioxide to make sugars (glucose). • Consumers eat producers, they take in carbon-containing food molecules. • Consumers break down these food molecules to obtain energy, they release carbon dioxide and water as waste products. • Producers and Consumers die, decomposers break down their remains and return carbon compounds to the soil. THE CARBON AND OXYGEN CYCLE (CONT.) • The Oxygen Cycle: Like carbon, oxygen cycles through ecosystems. • Producers release oxygen as a result of photosynthesis. • Most organisms take in oxygen from the air or water and use it to carry out their life processes. THE NITROGEN CYCLE • Nitrogen moves from the air to the soil, into living things, and back into the air. • Nitrogen Fixation: Organisms cannot use nitrogen until it has been “fixed”, or combined with other elements to form nitrogen-containing compounds. • Bacteria is known to fix nitrogen • Usually on the roots of certain plants THE NITROGEN CYCLE (CONT.) • Return of Nitrogen to the Environment: After nitrogen is fixed, producers can use it to build proteins and other complex compounds. • Decomposers break down the complex compounds in animal wastes and the bodies of dead organisms. • Decomposition returns simple nitrogen compounds to the soil. • Eventually bacteria will completely break down nitrogen compounds. • The bacteria releases free nitrogen back into the air: The cycle then continues and repeats.