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Questions and Answers
What happens to the initial substance in the situations mentioned in the chapter?
What happens to the initial substance in the situations mentioned in the chapter?
- It disappears completely
- It becomes heavier
- Its nature and identity change (correct)
- It remains the same
What is the term used to describe the process of a chemical change occurring?
What is the term used to describe the process of a chemical change occurring?
- Biological reaction
- Physical change
- Physical reaction
- Chemical reaction (correct)
What is the purpose of Activity 1.1?
What is the purpose of Activity 1.1?
- To show the properties of magnesium
- To demonstrate a chemical reaction (correct)
- To show the properties of sandpaper
- To demonstrate a physical change
What is the safety precaution mentioned in Activity 1.1?
What is the safety precaution mentioned in Activity 1.1?
What is the purpose of burning the magnesium ribbon in Activity 1.1?
What is the purpose of burning the magnesium ribbon in Activity 1.1?
What is collected in a watch-glass in Activity 1.1?
What is collected in a watch-glass in Activity 1.1?
What is used to clean the magnesium ribbon in Activity 1.1?
What is used to clean the magnesium ribbon in Activity 1.1?
What is used to hold the magnesium ribbon in Activity 1.1?
What is used to hold the magnesium ribbon in Activity 1.1?
What is the length of the magnesium ribbon used in Activity 1.1?
What is the length of the magnesium ribbon used in Activity 1.1?
What is the common outcome in the given daily life situations?
What is the common outcome in the given daily life situations?
What is the significance of burning the magnesium ribbon in Activity 1.1?
What is the significance of burning the magnesium ribbon in Activity 1.1?
What is the primary goal of performing Activity 1.1?
What is the primary goal of performing Activity 1.1?
Why is it necessary to keep the burning magnesium ribbon away from the eyes?
Why is it necessary to keep the burning magnesium ribbon away from the eyes?
What is the importance of rubbing the magnesium ribbon with sandpaper?
What is the importance of rubbing the magnesium ribbon with sandpaper?
What is the outcome of the burning of magnesium ribbon?
What is the outcome of the burning of magnesium ribbon?
What is the role of the watch-glass in Activity 1.1?
What is the role of the watch-glass in Activity 1.1?
Why do we say that a chemical reaction has taken place in the given daily life situations?
Why do we say that a chemical reaction has taken place in the given daily life situations?
What is the significance of the teacher's assistance in Activity 1.1?
What is the significance of the teacher's assistance in Activity 1.1?
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