Vocabulary
Across
- 2. A relationship where a parasite lives off its host and the host is weakened or killed
- 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.
- 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.
- 9. Molecule that contains atoms of the element carbon
- 12. A lake with minimal levels of nutrients required for producers
- 13. The materials that an organism must take in to enable it to live, grow, and reproduce
- 14. The rate at which organic matter is incorporated into plant bodies so as to produce growth.
- 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.
- 18. Uncharged or electrically neutral ions, which cluster with protons in the centre of an atom and compose its nucleus
- 19. Particles formed when two or more atoms of the same or different elements combine.
- 20. The ocean water, one of the two main divisions of the open sea environment
- 22. Organisms that live on or within their food source, completing the breakdown of complex molecules into simpler compounds.
- 23. A symbolic relationship in which both interacting species benefit, as when honeybees pollinate flowers as they feed on the flowers nectar.
- 24. A lake that falls in the mid-range between the two extremes of nutrient enrichment required by producers.
Down
- 1. The amount of material in an object
- 2. A change from one state to another
- 3. The layer in the stratosphere that filters ultraviolet radiation
- 4. A group of individuals of the same species living and interacting in the same geological area at the same time
- 5. The tendency for only the best adapted organisms to survive and reproduce in a given environment.
- 7. Consumers that eat both plants and animals
- 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.
- 11. Anything that has mass and takes up space, including everything that is solid, liquid or gas.
- 13. The means by which the nutrient elements and their compounds cycle continually through Earth’s atmosphere, hydrosphere, lithosphere and biosphere
- 14. A part of the nitrogen cycle in which atmospheric nitrogen is converted into other chemical forms available to plants
- 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
- 16. A permanently frozen layer of subsoil
- 19. The random and unpredictable changes in DNA molecules that can be transmitted to offspring and produce variability.
- 21. The trace elements of complex organic compounds required by all living organisms. These include boron, copper, zinc and others.
- 22. The disappearance of numerous species over a relatively short period of geological time.