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Chapter 3.2

STUDY
PLAY
Sunlight
the main energy source for life on Earth
Inorganic Chemical Compounds
soem types of organisms rely on the energy stored in __________ ___________ ____________.
Autotrophs
organisms that capture energy from sunlight or chemicals and use that energy to produce food; producers
Photosynthesis
process by which autotrophs get energy through light with the combination of carbon dioxide and water being sparked by light energy and turning into carbohydrates and oxygen
Chemosythesis
process by which hydrogen sulfide and oxygen combine, forming sulfur compound which produce chemical energy and then the cells make carbohydrates using carbon dioxide from sea water
Heterotrophs
rely on other organism for their energy and food supply; consumers
herbivores
eat plants
carnivores
eat meat
omnivores
eat plants and meat
detritivores
feed on dead matter
decomposers
break down organic matter
Food Chain
a series of steps in whihc organisms transfer energy by eating and being eaten; one-way flow of energy in an ecosystem
Food Web
network of food chains
Trophic Level
each step in a food chain or food web (consumers make up 2nd. 3rd, or higher)
Energy Pyramid
shows the relative amound of energy abailable at each trophic level; organisms use about 10% of this energy for life processes, rest is lost by heat
Biomass Pyramid
represents the amount of living organic matter at each trophic level; typically the greatest biomass is at the base of the pyramid
Pyramid of Numbers
shows the relative number of individual organisms at each trophic level