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Chapter 2 Review Eats other organisms. Consumers If a fox eats a bunny, and the bunny eats grass, what type of consumer is the fox? Second-level consumer Makes its own food. producers Best way to represent a large complex system (ex. water cycle). computer model In which process do producers use carbon from carbon dioxide to produce other carbon-containing molecules? photosynthesis What shape would the carbon cycle be in a physical model? circular Group of land ecosystems with similar climates and organisms. biome Ponds and rivers are what types of ecosystems? Fresh water Organisms that were brought by humans from one part of the world to another. Exotic species Overlapping food chains in an ecosystem. Food web Biome that is extremely cold and dry. tundra Break down the remains of dead organisms. decomposers Frozen soil in the tundra. permafrost Process by which a gas turns to a liquid. condensation Movement of organisms from one place to another. (ex. Spider moved by wind) dispersal Changing free nitrogen into a usuable form. Nitrogen fixation Eats only animals. carnivore Eats only plants. herbivore Eats both plants and animals. omnivore Second-level consumers(2). Carnivores Omnivores Producers release _____ as a product of photosynthesis. oxygen Feeds on dead organisms. scavenger Trees that lose their leaves each year. Deciduous trees Biome that has many grasses. grassland Shows energy moving from one feeding level to another. Energy pyramid Organisms eating other organisms in a series of events. Food chain Rain, snow, sleet, or hail (anything wet falling to Earth). precipitation Process by which a liquid changes to a gas. evaporation Where the fresh water of a river meets the salt water of the ocean. estuary Tallest layer of the rainforest. Emergent layer Leafy roof under the emergent layer in a rainforest. canopy Layer of shorter trees under the canopy. understory Annual average temperature and precipitation. climate