Download Plan for Today: Cycles of Matter Worksheet

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.