Grade 9 Unit C Vocabulary

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Across
  1. 2. Disposal site for waste materials, typically buried and covered.
  2. 8. Harmful substance that remains in the environment for a long time.
  3. 10. Use of living organisms to clean up or neutralize pollutants in the environment.
  4. 11. Measure of acidity or alkalinity in a solution.
  5. 12. Small, spineless creature without a backbone, visible to the naked eye.
  6. 13. Nutrient: Essential substance for organisms that lacks carbon-hydrogen bonds.
  7. 14. Substance with a pH less than 7, capable of donating protons.
  8. 15. Layer: Protective layer of ozone in the Earth's atmosphere, shielding against ultraviolet radiation.
  9. 16. Environmental contamination that harms living organisms.
  10. 21. Harmful effects arising from prolonged or repeated exposure to a substance.
  11. 22. Indicator: Organism used to assess environmental quality or pollution levels.
  12. 23. Chemical reaction that balances acidity and alkalinity.
  13. 24. Substance applied to soil to enhance plant growth.
  14. 25. Substance with a pH greater than 7, capable of accepting protons.
  15. 26. Gradual build-up of substances, such as pollutants, in living organisms.
Down
  1. 1. Organic molecule, such as fats and oils, important for energy storage and insulation.
  2. 3. Adverse effects resulting from a single exposure to a toxic substance.
  3. 4. Having a pH of 7, neither acidic nor basic.
  4. 5. Chemical used to control or eliminate pests.
  5. 6. Natural breakdown of substances by microorganisms.
  6. 7. Environmental contaminant that breaks down relatively quickly.
  7. 9. Lethal Dose 50%, the dose of a substance causing death in 50% of test subjects.
  8. 11. Large biomolecule composed of amino acids, crucial for cell structure and function.
  9. 14. Precipitation: Rainfall with an acidic pH due to air pollutants.
  10. 17. Liquid that drains or leaches from a landfill, often containing pollutants.
  11. 18. Organic compound, including sugars and starches, serving as a primary energy source.
  12. 19. Process where toxic substances accumulate in higher concentrations as they move up the food chain.
  13. 20. Nutrient: Compound containing carbon and hydrogen, essential for living organisms.