Podcast
Questions and Answers
What type of changes are broadly discussed in the text?
What type of changes are broadly discussed in the text?
- Environmental and climatic changes
- Physical and chemical changes (correct)
- Mechanical and electrical changes
- Biological and geological changes
Which activity involves cutting a piece of paper into smaller pieces and observing their properties?
Which activity involves cutting a piece of paper into smaller pieces and observing their properties?
- Activity 5.1 (correct)
- Activity 5.2
- Activity involving water and ice
- Activity 5.3
What is the outcome of adding water to chalk dust according to Activity 5.2?
What is the outcome of adding water to chalk dust according to Activity 5.2?
- Formation of new chalk
- Permanent dissolution of chalk dust
- No observable change (correct)
- Recovery of chalk
In which activity is a mixture of ice and water created?
In which activity is a mixture of ice and water created?
What does souring of milk represent in terms of changes?
What does souring of milk represent in terms of changes?
Which change is represented by a stretched rubber band?
Which change is represented by a stretched rubber band?
What type of change is the transformation of water from solid to liquid or gas to liquid?
What type of change is the transformation of water from solid to liquid or gas to liquid?
What is the process called when iron acquires a film of brownish substance after exposure to air?
What is the process called when iron acquires a film of brownish substance after exposure to air?
Which activity demonstrates the formation of a new substance?
Which activity demonstrates the formation of a new substance?
What is the powdery residue left behind when magnesium ribbon burns in the atmosphere?
What is the powdery residue left behind when magnesium ribbon burns in the atmosphere?
Which property does not change in a physical change?
Which property does not change in a physical change?
What happens to the color of the hack-saw blade tip when heated and then cooled?
What happens to the color of the hack-saw blade tip when heated and then cooled?
