This printable crossword puzzle on the topic of Ecology & Evolution has 20 clues. Answers range from 5 to 15 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
the study of relationships between two organisms or between an organisms and its environment
sun heats liquid water to vapor and it rises
water falls to earth
carbon dioxide released into the atmosphere from burning
bacteria convert nitrogen from waste into ammonia
when population grows without limit , it is called _________ growth
the variety of organisms considered at all levels, from populations to ecosystems
organisms leave and create a low density population
resources that are consumed/used more quickly than they are created
a balance between Earth’s resources, human needs, and the needs of other species
is a relationship that exists between two or more organisms that are fighting for the same limited resource
one organism (parasite) benefits from the relationship, while the other organism (the host) is harmed.
one organism benefits while the other is unaffected (neither benefited or harmed)
all of the things an organism needs and does within its habitat
organism hunting/killing another for food
a mature and stable community of plants and animals is a ______ community
formation of a brand new ecosystem is called _________ succession
bacteria convert nitrogen in ammonia to N2 so it can go back into the atmosphere
some water seeps from the surface of the Earth to underground aquifers
individual member of a species or population