a substance that can enter the atmosphere from decomposition or animal waste products
organisms that must eat to obtain energy
a model that shows amounts of energy or matter at each level in a food chain
producers use this process to create energy
a process where nitrogen is taken up by plants
meat eaters
organisms that eat meat and plants
bacteria that are autotrophs may use this process to create energy
used for energy to grow and maintain life
plant eaters
ecological pyramid
chemosynthesis
photosynthesis
assimilation
carbon
glucose
omnivores
carnivores
herbivores
heterotrophs
