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9 questions
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  • Q1

    Which of the following is NOT a chemical change?

    Burning a log of wood

    Baking a bread

    Dissolving sugar in water

    Frying an egg

    30s
    S8MT-IIIc-d-9
  • Q2

    Which of the following is a sign that a chemical change is taking place?

    smelling an offensive odor

    watching something dissolve in water

    a substance is melted at high heat

    the ability to break an object into pieces

    30s
    S8MT-IIIc-d-9
  • Q3

    Which of the following situations show chemical change?

    Rust forms on a hammer that has been left outside too long.

    A rock breaks into smaller pieces when it is struck with a hammer.

    A solid is formed when heat is removed from a sample of water.

    A cup of water turns pink when a few drops of red food coloring are added.

    30s
    S8MT-IIIc-d-9
  • Q4

    What happens to the particles of a substance after undergoing a chemical change?

    Bonds between particles of the substances are broken.

    Energy is absorbed or released by the particles.

    New bonds are formed between particles of the substances.

    All of the above

    30s
    S8MT-IIIc-d-9
  • Q5

    Physical change is a change in the physical properties of a substance such as size or shape. Which of the following is NOT a physical change?

    Burning a log of wood

    Dissolving sugar in water

    Crushing a can

    Breaking a glass

    30s
    S8MT-IIIc-d-9
  • Q6

    A phase change is a physical process in which a substance goes from one phase to another. When does phase change occur?

    Heat is added to or removed from the substance.

    A substance is combined with another substance.

    Particles of the substance maintain their kinetic energy.

    Particles of the substance are not changing their motion.

    30s
    S8MT-IIIc-d-9
  • Q7

    What happens to the particle arrangement of a liquid when it changes to gas?

    Particles move close to one another and become ordered.

    Particles move distant from each other in random motion.

    Particles do not move. Particles are close together with no regular arrangement.

    None of the above

    30s
    S8MT-IIIc-d-9
  • Q8

    Which is evidence of chemical change?

    Increase of temperature

    Appearance of new substance

    Formation of new shape

    Drastic change of size

    30s
    S8MT-IIIc-d-9
  • Q9

    A student mixed two clear liquids together. After a few minutes, a white powdery solid was seen and settled at the bottom of the test tube. What conclusion can be made based on the observations cited above?

    The liquids have been stored too long and no longer good.

    The liquids are toxic and should be handled with caution.

    The liquids were pure substances before they were mixed.

    The liquids have gone through a chemical change in which a precipitate was formed.

    30s
    S8MT-IIIc-d-9

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