Environmental Science Activity 2

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Across
  1. 2. is a substance that consists of two or more elements
  2. 3. is the smallest particle of an element that still has the properties of that element
  3. 5. the layer of earth atmosphere Where life operates.
  4. 6. is matter that has a definite composition
  5. 8. the protective blanket of gases (N, O2 , Ar, CO2 , trace gases), surrounding the Earth
  6. 12. A solution with a pH lower than 7.
  7. 15. Developing new knowledge based upon old knowledge.
  8. 17. is a force that holds molecules together
  9. 20. Stored energy that depends upon the relative position of various parts of a system.
  10. 21. It seeks to understand the natural world
  11. 23. A suggested explanation based on evidence that can be tested by observation or experimentation.
  12. 26. The act of noting or detecting phenomenon by the senses. For example, taking measurements is a form of observation.
  13. 27. is the main element in organic compounds, so carbon is essential to life on Eart
  14. 29. is the energy in the nucleus, or core, of an atom
  15. 30. examine, gain new knowledge, or build on previous knowledge about phenomena.
Down
  1. 1. comprises all types of water resources oceans, seas, lakes, rivers, streams, reservoir, polar icecaps, glaciers, and ground water.
  2. 4. is the study of energy
  3. 7. the energy stored in molecules and chemical compounds
  4. 9. The study of the interactions between life and its physical environment.
  5. 10. a substance that forms as a result of a chemical reacti
  6. 11. puts something in motion. moves cars and lifts elevators
  7. 13. produced when a rise in temperature causes atoms and molecules to move faster and collide with each other
  8. 14. the concentration of hydronium ions in a solution
  9. 16. A test that is used to rule out a hypothesis or validate something already known.
  10. 18. Organized body of knowledge that is obtained by study and experimentation
  11. 19. is anything that takes up space and has mass. Matter, in turn, is made up of chemical substances
  12. 22. A widely accepted hypothesis that stands the test of time. Theories are often tested, and usually not rejected.
  13. 24. It is the study of people, culture, and society
  14. 25. the outer mantle of the solid earth.
  15. 28. a substance that starts a chemical reaction