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Science 7 Module 3 Summative Assessment

Quiz by Melva D. Borja

Grade 7
Science
Philippines Curriculum: Grades K-10 (MELC)

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10 questions
Show answers
  • Q1
    Which statement identifies why oxygen is classified as a pure substance and air is classified as a mixture?
    Oxygen has a higher density than air.
    Oxygen goes under a phase change, whereas air is always a gas.
    Oxygen contains only one substance, but air contains several substances.
    Oxygen is more reactive than air.
    30s
    S7MT-Ie-f-4
  • Q2
    Which of the following explains why saltwater is considered a mixture?
    It is composed of two or more substances and retains their own chemical properties.
    It is composed of one compound.
    It is composed of one element.
    It is composed of two or more substances and has new chemical properties.
    30s
    S7MT-Ie-f-4
  • Q3
    When iron filings and sulfur powder are mixed together at room temperature, which one of the following statements is correct?
    The sulfur may be separated from the mixture by dissolving it in water.
    They cannot be separated from each other.
    A new compound called iron sulphide is formed
    The iron may be separated from the mixture by using a magnet.
    30s
    S7MT-Ie-f-4
  • Q4
    Which of the following represents the particles in a mixture?
    Answer Image
    Answer Image
    Answer Image
    Answer Image
    30s
    S7MT-Ie-f-4
  • Q5
    Which one of the following is a mixture?
    Oxygen
    Water
    Sea water
    Oxygen
    30s
    S7MT-Ie-f-4
  • Q6
    How is a mixture different from a compound?
    Each substance in a mixture keeps most of its characteristic properties.
    Solids, liquids and gases can form mixtures.
    Mixtures have two or more components.
    Mixtures are commonly found in nature.
    30s
    S7MT-Ie-f-4
  • Q7
    Ariel combines water, sugar, and lemon juice to form lemonade. What type of substance was made?
    Element
    Mixture
    Compound
    Molecule
    30s
    S7MT-Ie-f-4
  • Q8
    Dyes in water soluble markers may be separated by means of..
    sedimentation
    chromatography
    crystallization
    sublimation
    30s
    S7MT-Ie-f-4
  • Q9
    In the process of evaporation, which one of the following pieces of laboratory apparatus would NOT be used?
    bunsen burner
    filter funnel
    evaporating basin
    wire gauze
    30s
    S7MT-Ie-f-4
  • Q10
    Salt and water in seawater can be separated using these two stages:
    evaporation followed by filtration
    distillation followed by decanting
    distillation followed by evaporation
    filtration followed by evaporation
    30s
    S7MT-Ie-f-4

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