Katelyns biology test

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Author:
cj8
ID:
233648
Filename:
Katelyns biology test
Updated:
2013-09-08 20:38:05
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Cj8
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Description:
Biology test
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  1. whats the difference between an ion and a compound?
    an ion is a type of atom and loses/gains electrons. With a compound, it uses atoms and bonds them together; it doesnt lose any
  2. whats the difference between an atom and an element?
    an atom is the simplest unit of matter, and an element is made up of an atom.
  3. _ bonds give/receives electrons (ions)
    ionic
  4. _ bonds are weaker than the others
    ionic
  5. _ bonds hold sodium chloride together
    ionic
  6. _ and _ bonds both attract positive and negative
    ionic and hydrogen
  7. _ forces cause Ionic and Hydrogen bonds to bond
    electrical
  8. Ionic bonds, Hydrogen bonds, and covalent bonds form _
    compounds
  9. Hydrogen bonds form between _
    molecules
  10. attraction between slightly positive hydrogen ion and slightly negative hydrogen ion
    hydrogen bond
  11. _forms when atoms share electrons
    covalent bonds
  12. _ forms through the electrical force between oppositely charged ions
    ionic bond
  13. how is cellular respiration like exothermic?
    it breaks down food to release energy
  14. whats an example of exothermic?
    cellular respiration
  15. animals that light up.
    bioluminescense
  16. heat or light
    exothermic
  17. _ releases more energy than taken in
    exothermic
  18. enzymes are made up of _
    proteins
  19. _=biological catalyst
    enzyme
  20. activation energy is lowered by a _
    catalyst
  21. _ is the amount of energy to start a chemical reaction
    activation energy
  22. what does the arrow of the chemical reaction mean?
    yields
  23. the arrow in the chemical reaction tells the _ of the reaction
    direction
  24. where does a hydrogen bond occur?
    between molecules
  25. _ are electrons that are equally shared so they have no charges
    nonpolar bonds
  26. _ is always the greater amount
    solvent
  27. an _ brings things close so they can react.
    enzyme
  28. _ bonds are strong due to sharing.
    covalent
  29. _ bonds are weak due to attraction between charges
    ionic
  30. atoms share pairs of electrons in _ bonds
    covalent
  31. positive and negative attract, which causes _
    an ionic bond
  32. Long chains of amino acids are found in _
    proteins
  33. DNA and RNA are two types of _
    nucleic acids
  34. Fats, oils, and cholesterol are all types of _
    lipids
  35. the attraction among molecules of different substances is called _
    adhesion
  36. the four main types of carbon-based molecules in organisms are carbohydrates, lipids, nucleic acids, and _.
    proteins
  37. acidic solutions that have a ph are: a) less than 7, b) more than 7, c)a negative number, d)between 7 and 14
    a) less than 7
  38. attractions between water molecules are called _.
    polar bonds
  39. atoms r not composed of: a)protons b)neutrons c)covalent d)chemicals
    C)chemicals
  40. The smallest unit of matter is the _
    atom

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