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Vocabulary Review Ecology
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Portion of earth that supports life.
Biosphere
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Nonliving elements in an ecosystem.
Abiotic Factors
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Living elements in an ecosystem.
Biotic Factors
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All the individuals of the same species in an area.
Population
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A collection of interacting populations.
Community
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The community plus the physical factors in an area.
Ecosystem
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Variety of life in an area, usually measured as the number of species can live in an area.
Biodiversity
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The place where organisms live out their lives.
Habitat
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The role and position a species has in its environment.
Niche
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Animals that kill and eat other animals.
Predator
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Animals that predators hunt, kill and eat.
Prey
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The act of one organism feeding on another.
Predation
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A word that means “living together.”
Symbiosis
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A symbiotic relationship in which one species benefits and the other species is neither harmed nor benefited. Commensalism
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A symbiotic relationship in which both species benefit.
Mutualism
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A symbiotic relationship in which one organism benefits at the expense of the other.
Parasitism
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Organisms that are able to make their own food.
Autotrophs
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Organisms that are not able to make their own food
Organisms that are not able to make their own food. They must ingest food. Heterotrophs
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Organisms that obtain nutrients by eating other organisms.
Consumers
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Animals that feed on animals that have already died.
Scavengers
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Organisms that feed on dead or decaying plants or animals break them down into simpler molecules and return them to the soil. Decomposers
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A simple model that scientists use to show how matter and energy move through an ecosystem.
Food Chain
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Feeding step in a food chain.
Trophic Level
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Energy decreases as tropic level increases. (True or False)
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Only 10 percent of energy is transferred from one tropic level to the next. (True or False)
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The initial source of energy for ecological pyramids is energy from where?
The Sun
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Cycle where water is reused over and over again.
The Water Cycle
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The air is what percent nitrogen.
78%
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6CO2 + 6H2O + sunlight & chlorophyll C6H12O6 + 6O2
Photosynthesis
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6O2 + C6H12O6 --> 6H2O + 6CO2 + energy
Cellular Respiration
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Plant-eaters Herbivores
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Organism that eat plants and animals
Omnivore
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Organism that eat only animals.
Carnivore
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It takes a large number of producers to support a small number of primary consumers. (True or False)
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Interconnected food chains that show the feeding relationships in an ecosystem
Food Web
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A J-shaped curve shows what type of population growth?
Exponential Growth
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Cutting down trees to build houses.
Deforestation
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This gas causes global warming.
Increased CO2
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Another name for autotrophic Nutrition.
Photosynthesis
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The number of organisms of one species that an environment can support.
Carrying Capacity
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Any biotic or abiotic factor that restricts the existence, numbers, reproduction, of distribution of organisms. Limiting Factor
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The study of human population growth characteristics.
Demography
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Movement of individuals into a population.
Immigration
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Movement of individuals out of a population.
Emigration
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An increase in the size of a population over time.
Population Growth
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An S-Shaped curve shows what kind of population growth
Logistic Growth
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