predator an organism that eats another prey an organism that gets eaten, that is the food feeding relationship when one organism eats another photosynthesis the process that some organisms can do to change sunlight into food apex predator the top predator of a food chain; nobody eats him! generalist an organism that eats from more than one level decomposer an organism that eats dead organisms and waste consumer an organism that eats another organism producer an organism that can do photosynthesis calorie the amount of energy needed to raise the temperature of water one degree energy the ability to do work autotroph organism that can do photosynthesis heterotroph organism that must eat other organisms purpose the reason why we do an experiment experimental design how we do the experiment; the steps data what happened in the experiment; the numbers results what happened in the experiment; sentences conclusion what we learned from the experiment about the purpose observation information gathered using the 5 senses inference a conclusion based on observations energy the ability to do work adaptation any characteristic of an organism that helps it to survive and reproduce in its environment carnivore organism that eats only animals (meat) omnivore organism that eats both plants and animals detritus dead material that came from living things detritivore organism that eats detritus biomass all of the living material in an ecosystem trophic level the levels of a food web that show feeding relationships food web a diagram that shows how energy passes through the trophic levels biosphere all of the living organisms on Earth atmosphere the thin layer of gases that surrounds the earth lithosphere the rocky, mineral part of the planet that extends from the solid surface into the mantle hydrosphere all of the water on Earth ecosphere the four spheres together; the part of the planet where organisms live reproductive potential the possible unlimited growth of a population over time limiting factor any biotic or abiotic factor that acts in some way to limit the number of individuals in a population that survive and reproduce variable the parts of an experiment that can change control the parts of an experiment that do not change A continuation of Ecology Vocab I (Investigations 4-5)