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8th grade nc science chemistry

Quiz by Samuel Lahr

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12 questions
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  • Q1
    Which of the following is a chemical change?
    Dissolving sugar in water
    Rusting of iron
    Boiling of water
    Melting of ice
    30s
  • Q2
    What is the main gas produced during photosynthesis?
    Oxygen
    Nitrogen
    Hydrogen
    Carbon dioxide
    30s
  • Q3
    What is the atomic number of carbon?
    12
    6
    14
    8
    30s
  • Q4
    Which part of the atom contains protons and neutrons?
    Orbital
    Valence shell
    Nucleus
    Electron cloud
    30s
  • Q5
    Which of the following elements is a noble gas?
    Hydrogen
    Nitrogen
    Neon
    Oxygen
    30s
  • Q6
    What is the process by which a liquid turns into a gas?
    Condensation
    Precipitation
    Sublimation
    Evaporation
    30s
  • Q7
    What is the boiling point of water at sea level in degrees Celsius?
    100
    200
    0
    50
    30s
  • Q8
    What is the atomic number of oxygen?
    8
    16
    12
    6
    30s
  • Q9
    What do you call the number of protons in an atom's nucleus?
    Atomic number
    Valence number
    Molecular weight
    Mass number
    30s
  • Q10
    Which of the following best describes an exothermic reaction?
    A reaction that produces gas
    A reaction that releases heat
    A reaction that absorbs heat
    A reaction that changes color
    30s
  • Q11
    What is the chemical formula for table salt?
    CaCl2
    KCl
    MgCl2
    NaCl
    30s
  • Q12
    Which element is represented by the symbol 'O'?
    Carbon
    Iron
    Gold
    Oxygen
    30s

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