Presentation on theme: "Cycles in Nature Ch. 25-2 EQ: How does matter move among the biotic and abiotic parts of an ecosystem?"— Presentation transcript:
1 Cycles in NatureCh. 25-2EQ: How does matter move among the biotic and abiotic parts of an ecosystem?
2 Recycling in the Biosphere Energy and matter move through the biosphere very differentlyUnlike the one-way flow of energy, matter is recycled within and between ecosystems
3 Evaporation/Transpiration The Water CyclePrecipitationRunoffSeepageEvaporation/TranspirationCondensation
4 What these term mean: Precipitation – Rain, snow, hail, mist Runoff – water running down a hill/ mountainSeepage – water going into the groundEvaporation – water going into the air (think steam)Transpiration – water going into the air from the water that is in plants and animalsCondensation – Water forming clouds
5 Water moves between the ocean, atmosphere and land.
6 Nutrient CyclesA nutrient is a chemical substance that an organism needs to sustain lifeSimilar to water, nutrients are passed between organisms and the environment through cycles
7 Carbon CycleThe carbon cycle starts with producers removing CO2 from the air during photosynthesisThey use this to make sugars that make up their structure which other animals eat.Energy is released from these molecules during respiration.Respiration uses oxygen and releases CO2.Photosynthesis then uses that CO2 and the cycle starts again.
9 Nitrogen Cycle All organisms require nitrogen to make proteins. Only certain types of bacteria can use the nitrogen in the airSuch bacteria live in the soil and on the roots of some plants. They convert nitrogen gas into ammonia in a process called nitrogen fixation
10 Nitrogen Cycle key terms: Nitrogen fixation – turns nitrogen in the air into ammonia.Nitrification – turns ammonia into a useful form called nitrateDenitrification – changes the Nitrate to nitrogen gas.Assimilation – Plants or animals taking in the useful nitrogen (Nitrate)Ammonification – Animal waste that goes into the ground (think cow manure/ fertilizer)