Sras Gr.7 Science (Elements)

18 Questions | Total Attempts: 12

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Sras Gr.7 Science (Elements)

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Questions and Answers
  • 1. 
    Which one do you think doesn't belong to the group of heterogenous?
    • A. 

      Cereal in milk

    • B. 

      Pulpy orange juice

    • C. 

      Fruit salad

    • D. 

      Sand

    • E. 

      Milk

    • F. 

      Halo-Halo

  • 2. 
    Which one do you think doesn't belong to the group?
    • A. 

      Salt water

    • B. 

      Juice

    • C. 

      Gatorade drinks

    • D. 

      Gravel

    • E. 

      Soda drinks

  • 3. 
    Copper wire is belong to what group?
    • A. 

      Heterogenous

    • B. 

      Element

    • C. 

      Homogenous

    • D. 

      Compound

  • 4. 
    Compound and elements are considered pure substances.
    • A. 

      True

    • B. 

      False

  • 5. 
    Mixtures are considered also as pure substances.
    • A. 

      True

    • B. 

      False

  • 6. 
    They constitute the simplest chemical substances in which all the atoms are exactly the same.
  • 7. 
    They are represented by their chemical formula.
  • 8. 
    Check  all the COMPOUNDS.
    • A. 

      Acetic Acid

    • B. 

      Water

    • C. 

      Brass

    • D. 

      Carbon dioxide

    • E. 

      Sugar

    • F. 

      Methane

    • G. 

      Sucrose

    • H. 

      Pork

    • I. 

      Mud

    • J. 

      Cooking oil

  • 9. 
    Check all the HETEROGENOUS MIXTURES.
    • A. 

      Peanut butter

    • B. 

      Copper wire

    • C. 

      Air with no clouds

    • D. 

      Concrete

    • E. 

      Carbonated beverage or beerOption 5

    • F. 

      Oil and water

  • 10. 
    When an acid is dissolved in water,there are more hydrogen ions than hydroxide ions in the solution.
    • A. 

      True

    • B. 

      False

  • 11. 
    Base reacts to metals violently.
    • A. 

      True

    • B. 

      False

  • 12. 
    The higher the pH level of a substance, the more acidic it is.
    • A. 

      True

    • B. 

      False

  • 13. 
    Most acid feels slippery when touched. 
    • A. 

      True

    • B. 

      False

  • 14. 
    The pH level of neutral substances is 7.
    • A. 

      True

    • B. 

      False

  • 15. 
    Most bases (substances) has hydroxide in their chemical composition.
    • A. 

      True

    • B. 

      False

  • 16. 
    Do we consider the pure substance as compound when it has it chemical formula? 
    • A. 

      True

    • B. 

      False

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