4 Questions
Which of the following is NOT one of the observations that help determine whether a chemical reaction has taken place?
Change in taste
What is formed when magnesium ribbon burns with a dazzling white flame?
Magnesium oxide
Which observation is used in the text to determine if a chemical reaction has taken place when discussing the burning of magnesium ribbon?
Evolution of a gas
What causes food to change into digestible forms in our body?
Chemical changes
Study Notes
Chemical Reaction Observations
- Change in color, odor, or temperature are observations that help determine if a chemical reaction has taken place
- Formation of a precipitate or release of gas are also indications of a chemical reaction
- Change in physical state is another observation that can indicate a chemical reaction has occurred
Magnesium Ribbon Reaction
- When magnesium ribbon burns, it produces a dazzling white flame and forms magnesium oxide
- The dazzle of the flame is an observation used to determine that a chemical reaction has taken place
Digestion in the Human Body
- Enzymes are biological molecules that cause food to change into digestible forms in the human body
Test your knowledge on chemical changes of matter with this quiz. The quiz covers various situations like leaving milk at room temperature, fermenting grapes, and digestion in our body, where the nature and identity of substances change. Explore the concepts of physical and chemical changes in matter.
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