science Crossword

Physical rather than biological; not derived from living organisms.
relating to water
relating to or resulting from living things, especially in their ecological relations.
a large naturally occurring community of flora and fauna occupying a major habitat, e.g., forest or tundra.
the series of processes by which carbon compounds are interconverted in the environment, chiefly involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels.
the weather conditions prevailing in an area in general or over a long period.
an association between two organisms in which one benefits and the other derives neither benefit nor harm.
abandon (a person, cause, or organization) in a way considered disloyal or treacherous.
a biological community of interacting organisms and their physical environment.
the plants of a particular region, habitat, or geological period.
a large area covered chiefly with trees and undergrowth.
the animals of a particular region, habitat, or geological period.
a large open area of country covered with grass, especially one used for grazing.
a shallow recess, especially one in a wall to display a statue or other ornament.
the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition.
the doctrine that mutual dependence is necessary to social well-being.
the practice of living as a parasite in or on another organism.
each of several hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain and the same nutritional relationship to the primary sources of energy.
a vast, flat, treeless Arctic region of Europe, Asia, and North America in which the subsoil is permanently frozen.
the state of the atmosphere at a place and time as regards heat, dryness, sunshine, wind, rain, etc.