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7.6AC

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  • Physical or Chemical? Wood burning to ash
    chemical
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    4
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    ice melting
  • Element or Compound: Written as a chemical formula
    compound
  • Element or Compound? Made up of only 1 type of atom
    element
  • Both the esophagus and the small intestine are involved in the digestion of food. The esophagus squeezes food into the stomach by wave-like muscle contractions. Peptidase enzymes in the small intestine break food molecules smaller
    both result only in chemical changes
    muscle contractions=physical changes, peptidase=chemical
    both result only in physical changes
    muscle contractions=chemical changes, peptidase=physical
  • Physical or Chemical? An ice cube is put in the sun and it heats up
    Physical
  • Element or Compound? NaCl
    compound
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    DE
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    B
  • Physical or Chemical? Salt dissolving in water
    physical
  • Physical or Chemical? Your saliva begins to break down food once you chew it
    chemical
  • How many molecules of salt is this? 4NaCl
    4
  • Physical or Chemical? Water is heated and begins to bubble as it changes states of matter
    Physical
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    A
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    D
  • Physical or Chemical? breaking down of food molecules
    chemical
  • Element or Compound: Written as a single chemical symbol
    element
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    C
  • Physical or Chemical? An apple begins to rot
    chemical
  • Physical or Chemical? breaking down/decaying of organisms
    chemical
  • Element or Compound: Able to be broken down chemically
    compound
  • See Picture
    3