Question

To observe and categorize changes into reversible, irreversible, slow, fast, physical and chemical changes.
Materials Required: balloon, paper, scissors plastic sheet, rubberband, iron nail, water, candle, matchstick, sponge, straight string, a spoonful of milk, lemonjuice, wheatflour, plant sapling,curd.
PROCEDURE: Perform the changes as mentioned in table and note down the result in changes.

Answer 1

Answer:

1 - chemical change, slow and irreversible

2 - physical change, fast and irreversible

3 - physical change, slow and reversible

4 - physical change, fast/slow (depends upon the temperature) and reversible

5 - chemical change, fast and irreversible

Explanation: