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Questions and Answers
What is a characteristic of physical changes?
What constitutes the reactants in a chemical reaction?
Which of the following is NOT evidence of a chemical reaction?
How does salting preserve food?
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What is the role of beneficial bacteria in fermentation?
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What type of locations primarily use the WHMIS safety symbols?
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Which of the following correctly describes the main purpose of WHMIS?
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What shape and color is used to indicate the highest hazard level in HSHS?
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How many safety symbols are in the HSHS system?
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What do the symbols in WHMIS primarily indicate?
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Which of the following is NOT a component included in Material Safety Data Sheets (MSDS)?
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What is the meaning of the orange diamond in the HSHS system?
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What does the yellow inverted triangle symbolize in the HSHS system?
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What is the primary purpose of the scientific method in relation to hypotheses?
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Which of the following best describes qualitative observations?
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What type of knowledge does the observation of a burning magnesium ribbon represent?
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Which of the following is NOT a physical property of a substance?
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What process is characterized by a change in size, shape, or state while retaining physical properties?
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How would you classify the observation that magnesium burns with a bright white light?
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Which of the following properties indicates a substance's ability to dissolve in water?
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Which term describes the ability of a substance to be drawn into wires without breaking?
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What is the definition of combustion?
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Which statement correctly describes a pure substance?
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At what point is a substance likely to ignite, known as its 'flash point'?
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How does a reaction with acids typically manifest?
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What distinguishes a colloid from a solution?
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What is one characteristic of a suspension?
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Which option describes a mechanical mixture?
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What principle is maintained during both physical and chemical changes?
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What does it mean for an atom to become an ion?
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Which statement correctly describes the octet rule?
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In reference to isotopes, what is the defining characteristic?
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What is the significance of multivalent elements in ion formation?
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Why is the atomic mass of nitrogen listed as 14.01 amu in the periodic table?
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Which of the following elements would be most likely to react to achieve stability?
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How is the atomic mass unit (amu) defined?
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What happens to an atom's charge when it gains two electrons?
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