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6.8 Vocabulary

Across
the part of the forest that is blanketed with decaying leaves, twigs, fallen moss, and other organic particles
the light- and dark-patterned wood that forms as a tree grows in diameter over time
an organism that captures energy directly from the sun to make their own food; trees, grasses, and some microbes do this with photosynthesis; the first level of organisms in all food webs are producers
the path that energy travels as one organism eats another
the third level of a food web; an organism that eats primary consumers
the second level of a food web but the first level of organisms that get energy by eating producers
the upper layer of a forest where the treetops of most of the trees meet to form a layer of habitats for insects, birds, and tree-climbing mammals
an area of land covered by trees
an organism that eats other organisms; there are three possible levels of consumer in a food web: primary, secondary, and tertiary
a community of different species that depend on interacting with each other and their physical environment for survival
an event that changes conditions in an ecosystem
Down
the fourth level of a food web; an organism that eats secondary consumers
a back-and-forth exchange of carbon dioxide and oxygen between plants, animals, and the environment
the process of turning sunlight, carbon dioxide, and water into glucose and oxygen
an organism that breaks down organic waste and feeds on the nutrients
the middle layer of the forest that contains a mixture of small and immature trees that provide shelter for animals
a visual that shows the network of food chains in an ecosystem
an interaction between two organisms that occurs when one organism (predator) eats another organism (prey)
an interaction between organisms that occurs whenever two or more organisms require the same limited resource
a prolonged period of unusually low rainfall, resulting in water shortages