Unit 2 Vocabulary Crossword Ch. 2 (section 2.2 -2.4)

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Across
  1. 4. occurrence in a natural system in which it becomes locked into a positive feedback loop of unchecked change, beyond this point the system can change so drastically that it suffers from severe degradation
  2. 6. is a carbon based compound
  3. 8. is anything that has mass and takes up space
  4. 9. a change in matter where there is no change in its chemical composition
  5. 10. law thaat states whenever energy is converted from one form to another in a physical or chemical change, no energy is created or destroyed
  6. 15. law that states whenever energy is transformed from one type to another in a physical or chemical change, the result is a lower-quality or less usable energy
  7. 18. energy associated with motion
  8. 19. occurs when an output of matter, energy, or information is fed back into the system an input and leads to changes in that system
  9. 20. a change in the chemical composition of the substance involved(chemical change)
  10. 22. is the capacity to do work
Down
  1. 1. states that whenever matter undergoes a physical or chemical change, no atoms are created or destroyed
  2. 2. the forms of an element that have the same atomic number but different mass numbers
  3. 3. energy travels as a wave this occurs as a result of changes in electrical and magnetic fields, another form of kinetic energy
  4. 5. energy stored and potentially available for use
  5. 7. Numeric value that indicates the relative acidity or alkalinity of a substance on a scale of 0 to 14, with the neutral point at 7. Acidic solutions have PH values lower than 7 basic or alkaline solutions have PH values greater than 7
  6. 11. combinations of two or more different elements held together in fixed proportions
  7. 12. is a set of components that function and interact in some regular way
  8. 13. is the basic building block of matter
  9. 14. a combination of two or more atoms of the same or different elements held together by forces known as chemical bonds
  10. 16. an atom or group of atoms with a charge (+ or -)
  11. 17. heat or the total kinetic energy of all moving atoms, ions, or molecules in a sample of matter
  12. 21. is a type of matter with a unique set of properties that cannot be broken down into simpler substances by chemical means