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Ecosystems and Biome

Chapter 2 Science Vocab

TermDefinition
Producer An organism that makes it's own food.
Consumer An organism that obtains energy by feeding on other organisms.
Herbivore Consumers that eat only plants.
Carnivore Consumers that eat only animals.
Omnivore Consumers that eat both plants and animals.
Scavenger A carnivore that feeds on the bodies of dead organisms.
Decomposer Organisms that break down biotic wastes and dead organisms and return the raw materials to the ecosystems.
Food Chain A series of events in which one organism eats another and obtain energy
Food Web It consists of many overlapping food chains in an ecosystem
Energy Pyramid Shows the amount of energy that moves from one feeding level to another in a food web.
Evaporation The process in which molecules of liquid water absorb energy and change to a gas
Condensation The process in which gas changes to a liquid
Percipitation The process in which water vapor condenses and eventually grows larger into rain, snow, sleet or hail
Nitrogen Fixation The process of changing free nitrogen, into a usable form of nitrogen.
Biome A group of ecosystems with similar climates and organisms.
Climate The average annual temperature and amount of precipitation.
Desert An area that receives less than 25 centimeters of rain per year.
Rain Forest Forests with large amount of rainfall each year
Emergent Layer The tallest layer of the rainforest which receives the most sunlight
Canopy A leafy roof
Understory A shaded Layer of the rainforest
Grassland An area that is populated mostly by grasses and other non-woody plants
Savanna An area that receives as much as 120 centimeters of rain per year
Deciduous Tree Trees that shed their leaves and grow new ones each year
Boreal Forest Dense forests found in upper regions of the northern hemispheres
Coniferous Tree Trees that produce seeds or cones
Tundra Extremely cold and dry
Permafrost Frozen Soil
Estuary the tidal mouth of a large river, where the tide meets the stream.
Intertidal Zone the area that is above water at low tide and under water at high tide
Neritic Zone the relatively shallow part of the ocean above the drop-off of the continental shelf
Biogeography Where organisms live and how they got there.
Continental Drift Plates moving, moving the continents
Dispersal The movement of organisms from one place to another.
Exotic Species An organism carried to a new location by humans.
Created by: tdr201087261