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TEKS Grade 8 Science - 8.5.E The Law of Conservation of Mass

Quiz by Texas Education Agency

Grade 8
Science (2017)
Texas Essential Knowledge and Skills (TEKS)

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6 questions
Show answers
  • Q1
    A teacher asks a student to write the chemical equation for photosynthesis. The student’s response is shown below. The equation is not balanced correctly. Which of these is a balanced equation for photosynthesis?
    Question Image
    #texas/42f49aba-ff70-48a8-84e8-a30523320ff9/C.png
    #texas/42f49aba-ff70-48a8-84e8-a30523320ff9/D.png
    #texas/42f49aba-ff70-48a8-84e8-a30523320ff9/A.png
    #texas/42f49aba-ff70-48a8-84e8-a30523320ff9/B.png
    60s
    8.5e
  • Q2
    60s
    8.5e
  • Q3
    Question Image
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    60s
    8.5e
  • Q4
    Which BEST explains why the total mass of the product(s) would be less than the total weight of the reactant(s) after a chemical reaction?
    Physical change occurred.
    Atoms involved in the reaction lost mass.
    Gases were released to the atmosphere.
    Precipitates were created in the new solution.
    60s
    8.5e
  • Q5
    If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products?
    3 atoms of carbon (C)
    6 atoms of carbon (C)
    12 atoms of carbon (C)
    2 atoms of carbon (C)
    60s
    8.5e
  • Q6
    How does a balanced chemical equation satisfy the Law of Conservation of Mass?
    During a chemical reaction, the total number of atoms increases.
    During a chemical reaction, matter is destroyed.
    During a chemical reaction, one or more new substances are formed.
    During a chemical reaction, the total amount of matter stays the same.
    60s
    8.5e

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