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