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PSSA Science Vocab review

Across
Application of scientific, physical , mechanical and mathematical principals used to improve life
Organisms that obtain energy by feeding on other organisms
Ways humans apply biological concepts to produce products
A community of living organisms of a single major ecological region
Organism that gains energy by consuming dead organic matter
Down
Species that is in danger of extinction
Branch of biology dealing with the development of living things
Any set of possible forms of a gene
Total of the surroundings
Mixing decaying leaves, manure and other nutritive matter to fertilize soil
Community of living organisms
Environmental factor related to living organisms
A non living factor or element