ELT PSSA

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Across
  1. 7. - a physical process where a substance changes from a liquid state to a gaseous state (vapor) at temperatures below its boiling point
  2. 10. - a state in ecological science where a population’s size remains relatively stable over time, occurring when the birth rate plus immigration equals the death rate plus emigration.
  3. 12. - a continuous, geologic process that describes how rocks change from one type to another—igneous, sedimentary, or metamorphic—over millions of years
  4. 13. - an oceanographic process where strong winds, combined with the Coriolis effect, push surface water away from a coastline or in the open ocean, causing cold, nutrient-rich water from the deep ocean to rise and fill the gap.
  5. 14. – Water or ice falling from the sky
  6. 17. – the process of increasing interdependence and integrating at a fast rate.
  7. 20. - the natural movement of water on, above, and below Earth's surface, driven by solar energy and gravity.
Down
  1. 1. – To be maintained at a certain rate or level.
  2. 2. - A method of procedure that characterized natural science. This includes forming a observation, measurement, experiment, formulation, testing, and reforming a hypothesis.
  3. 3. – an organism that cannot produce its own food, so it must eat organic substances to gain energy.
  4. 4. - organisms that produce their own organic food using sunlight or chemical energy.
  5. 5. - the process of excessive nutrient enrichment (primarily nitrogen and phosphorus) in water bodies, triggering rampant algae growth and degraded water quality
  6. 6. - the introduction of harmful materials (pollutants) or energy into the natural environment—air, water, or land—at rates faster than they can be dispersed, decomposed, or recycled
  7. 8. – an assembly of different spices that coexist in the same habitat.
  8. 9. - a vertical cross-section of soil, extending from the surface down to the parent material, which reveals distinct layers called horizons.
  9. 11. - natural materials or energy sources that replenish themselves naturally at the same rate and time they are used.
  10. 15. - a diagnostic tool used in biology to identify unknown organisms or specimens by selecting from pairs of contrasting, mutually exclusive statements (a couplet)
  11. 16. - a crucial biogeochemical process where nitrogen moves between the atmosphere, soil, water, and living organisms, converting into various chemical forms
  12. 18. - the scientific study of the relationships between living organisms—including humans—and their physical environment
  13. 19. - the capacity to do work, cause change, or move matter