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Unit 6 (1-3)

Earth's Biomes & Ecosystems (Lessons 1-3)

TermDefinition
Producers organism that uses light or chemical energy to make food molecules, usually by photosynthesis
Consumers organisms that must eat other living things for food
Decomposers organisms that get energy and nutrients by breaking down the remains or wastes of other organisms
Photosynthesis the process of converting carbon dioxide and water vapor into sugars and oxygen gas by using the energy from sunlight
Chloroplast organelle where photosynthesis takes place; found only in the cells of photosynthetic organisms
Chlorophyll green pigment responsible for capturing the sun’s energy during photosynthesis
Glucose a type of sugar molecule produced during photosynthesis that is used to store chemical energy
Adenosine Triphosphate (ATP) a molecule used by organisms to store energy being released during the breaking down of the sugar molecules
Cellular Respiration the process of breaking down sugar molecules to produce the energy-carrying molecule ATP
Mitochondria organelle where cellular respiration takes place
Ecosystem a community of living organisms and their nonliving environment
Habitat the place where an organism lives within an ecosystem
Niche the position or role a species has in an ecosystem
Herbivore consumers that eat only plants
Carnivore consumers that eat other animals
Omnivore consumers that eat both plants and animals
Scavenger specialized consumer that feeds on dead organisms
Food chain the path of energy transfer from producers to consumers
Food web shows the feeding relationships among many different organisms in an ecosystem
Matter anything that has mass and takes up space
Energy the ability to do work and enables organisms to use matter in life processes
Law of conservation of energy states that energy can change forms but cannot be created or destroyed
Law of conservation of mass states that mass can change forms but cannot be created or destroyed
Energy pyramid a tool that can be used to trace the flow of energy through an ecosystem
Open system a system in which matter can enter and leave
Water cycle the movement of water between the oceans, atmosphere, land and living things
Evaporation water changing from liquid to vapor as it absorbs energy from the sun
Transpiration the release of water vapor from the leaves of plants
Respiration the release of water vapor as waste during the process of breaking down sugar molecules
Condensation the change of water vapor to liquid as it cools
Precipitation water that falls from the atmosphere to the land and oceans
Runoff precipitation that falls on land and flows into streams and rivers
Groundwater precipitation that seeps into the ground and is stored underground; slowly flows back into the soil, streams, rivers, and oceans
Nitrogen cycle movement of nitrogen between the environment and living things
Nitrogen fixation the process in which soil bacteria change nitrogen gas into forms that plants can use
Carbon cycle movement of carbon through organisms and between organisms and the physical environment
Combustion the burning of material
Created by: SchvederC