Vocabulary

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Across
  1. 2. A relationship where a parasite lives off its host and the host is weakened or killed
  2. 6. A collection of tropical evergreen trees with stilt like aerial roots that cause thick undergrowth and provide habitat for marine organisms, waterfowl and other coastal species.
  3. 8. The main constituents of the complex organic compounds required by all living organisms. The six major ____________ are carbon, oxygen, hydrogen, nitrogen, phosphorus and sulphur.
  4. 9. Molecule that contains atoms of the element carbon
  5. 12. A lake with minimal levels of nutrients required for producers
  6. 13. The materials that an organism must take in to enable it to live, grow, and reproduce
  7. 14. The rate at which organic matter is incorporated into plant bodies so as to produce growth.
  8. 17. Sum of the number of protons and the number of neutrons in the nucleus of an atom. This sum gives the approximate mass of that atom.
  9. 18. Uncharged or electrically neutral ions, which cluster with protons in the centre of an atom and compose its nucleus
  10. 19. Particles formed when two or more atoms of the same or different elements combine.
  11. 20. The ocean water, one of the two main divisions of the open sea environment
  12. 22. Organisms that live on or within their food source, completing the breakdown of complex molecules into simpler compounds.
  13. 23. A symbolic relationship in which both interacting species benefit, as when honeybees pollinate flowers as they feed on the flowers nectar.
  14. 24. A lake that falls in the mid-range between the two extremes of nutrient enrichment required by producers.
Down
  1. 1. The amount of material in an object
  2. 2. A change from one state to another
  3. 3. The layer in the stratosphere that filters ultraviolet radiation
  4. 4. A group of individuals of the same species living and interacting in the same geological area at the same time
  5. 5. The tendency for only the best adapted organisms to survive and reproduce in a given environment.
  6. 7. Consumers that eat both plants and animals
  7. 10. Organisms that feed by injecting or engulfing particles, parts or entire bodies of other organisms, living or dead, including herbivores, carnivores, omnivores, scavengers and detrivores.
  8. 11. Anything that has mass and takes up space, including everything that is solid, liquid or gas.
  9. 13. The means by which the nutrient elements and their compounds cycle continually through Earth’s atmosphere, hydrosphere, lithosphere and biosphere
  10. 14. A part of the nitrogen cycle in which atmospheric nitrogen is converted into other chemical forms available to plants
  11. 15. Rock formed when existing rocks lying deep below the earth’s surface are subjected to high temperatures, high pressures, chemically active fluids or a combination of these agents, causing the rocks’ crystal structure to change
  12. 16. A permanently frozen layer of subsoil
  13. 19. The random and unpredictable changes in DNA molecules that can be transmitted to offspring and produce variability.
  14. 21. The trace elements of complex organic compounds required by all living organisms. These include boron, copper, zinc and others.
  15. 22. The disappearance of numerous species over a relatively short period of geological time.