Question

and the w
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4.
5.
6.
Souring of mill
A drawing sheet changes when you draw a picture on it. Can you reverse this
change?
Give examples to explain the difference between changes that can or cannot be
reversed.
A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage
on a fractured bone. It becomes hard on drying to keep the fractured bone
immobilised. Can the change in POP be reversed?
A bag of cement lying in the open gets wet due to rain during the night. The
next day the sun shines brightly. Do you think the changes, which have occurred
in the cement could be reversed?
7.
SUGGESTED PROJECTS AND ACTIVITIES
1. Take a lemon, a paintbrush and a piece of paper. Cut the lemon and squeeze
out its juice in a cup. Dip the brush in the lemon juice and write a message
on the paper. Let the paper dry and you find that the letters of your message
become invisible. Now, press the paper with hot iron or warm it by holding it
above the flame of a candle (Take care that it does not catch fire). As the
paper gets warm, invisible letters change into dark brown colour. Identify the
changes that can be reversed.
2. Observe preparation of dishes at your home. Identify two changes that can
be reversed.
3. Maintain a record for one year of the seasonal changes in vegetables, clothing.
nature and events around you. Identify the changes that can or cannot be
reversed
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ITS​

Answer 1

Answer:

to long too read

Explanation:

so let my that it cannot be read