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  1. 3. of the basic elements of any living thing.
  2. 6. the speed at which light travels
  3. 7. electrical force linking atoms
  4. 9. electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength
  5. 13. outer layer that surrounds a cell, letting substances in
  6. 14. small rocky body orbiting the sun
  7. 16. Zero -The temperature at which molecular energy is at a minimum
  8. 20. radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
  9. 26. -The rate at which velocity changes over time; an object accelerates if its speed, direction, or both change
  10. 28. number of protons in the nucleus of an atom
  11. 29. the smallest of the particles that make up an atom
  12. 32. lines of force surrounding a permanent magnet or a moving charged particle
  13. 33. a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy.
  14. 34. natural scientist who formulated a theory of evolution by natural selection (1809-1882)
  15. 36. a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
  16. 37. a wave that transmits sound
  17. 38. displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving toward the observer
  1. 1. negatively charged ion
  2. 2. a scale of temperature on which water freezes at 32° and boils at 212° under standard conditions
  3. 4. a chemical element is an atom that has a different number of neutrons
  4. 5. theory that the universe originated sometime between 10 billion and 20 billion years ago from the cataclysmic explosion of a small volume of matter at extremely high density and temperature
  5. 8. -Any elements from group 1 on the periodic table
  6. 10. the circular motion that happens when warmer air or liquid rises, while the cooler air or liquid drops down
  7. 11. a physical force of being pushed.
  8. 12. ion-a positively charged atom of hydrogen; that is to say, a normal hydrogen atomic nucleus
  9. 13. a strand of DNA that is encoded with genes.
  10. 15. helix that genes are made of.
  11. 17. region of space having a gravitational field so intense that no matter or radiation can escape
  12. 18. uniform microwave radiation remaining from the
  13. 19. a type of energy an object has because of its position
  14. 20. radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
  15. 21. an atom or particle with a positive or negative electrical charge.
  16. 22. change in the apparent frequency of a wave as observer and source move toward or away from each other
  17. 23. metal -Any element from group 2 on the periodic table
  18. 24. the force that attracts a body toward the center of the earth, or toward any other physical body having mass
  19. 25. a positive electrical charge atom.
  20. 27. strength or energy as an attribute of physical action or movement
  21. 30. atom with no charge, or is "neutral."
  22. 31. part of the cell containing DNA and RNA and responsible for growth and reproduction
  23. 34. positively charged ion
  24. 35. basic unit of a chemical element.