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Questions and Answers
What is the purpose of the activity described in the text?
What is the purpose of the activity described in the text?
- To observe the reaction of magnesium with air (correct)
- To investigate the digestion of food in our body
- To study the changes in milk at room temperature
- To understand the fermentation process of grapes
What happens when milk is left at room temperature during summers?
What happens when milk is left at room temperature during summers?
- It boils
- It remains unchanged
- It freezes
- It undergoes a chemical change (correct)
What happens when an iron tawa/pan/nail is left exposed to humid atmosphere?
What happens when an iron tawa/pan/nail is left exposed to humid atmosphere?
- It gets rusted due to a chemical change (correct)
- It becomes stronger
- It remains unaffected
- It melts
What can be inferred when grapes get fermented?
What can be inferred when grapes get fermented?
What type of change occurs when food gets digested in our body?
What type of change occurs when food gets digested in our body?
Flashcards
Magnesium and Air Reaction
Magnesium and Air Reaction
Combination of magnesium and oxygen in the air.
Milk Spoiling
Milk Spoiling
When milk sours due to bacterial action, changing its composition.
Rusting
Rusting
Iron reacts with oxygen and moisture to form iron oxide.
Grape Fermentation
Grape Fermentation
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Food Digestion
Food Digestion
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Study Notes
Chemical Changes
- The purpose of the activity described in the text is to observe and understand chemical changes that occur in everyday life.
Milk Left at Room Temperature
- When milk is left at room temperature during summers, it undergoes a chemical change, resulting in the growth of bacteria and hence spoilage.
Iron Exposure to Humid Atmosphere
- When an iron tawa/pan/nail is left exposed to a humid atmosphere, it undergoes rusting, which is a chemical change.
Fermentation of Grapes
- When grapes get fermented, it can be inferred that a chemical change has occurred, resulting in the conversion of grape juice into alcohol and carbon dioxide.
Digestion in the Human Body
- When food gets digested in our body, a chemical change occurs, where complex molecules of food are broken down into simpler molecules that can be absorbed and utilized by the body.
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