Write about 20 physical and chemical changes that you observe in your surroundings.
Answers
Answer:
Examples of physical changes:
1. Making of squash by mixing sugar in water.
2. Making of salt powder by grinding solid piece of salt.
3. Wetting of clothes.
4. Freezing of water in freezer of refrigerator.
5.Crushing a can
6.Melting an ice cube
7.Boiling water
8.Mixing sand and water
9.Breaking a glass
10.Dissolving sugar and water
11.Shredding paper
12.Chopping wood
13.Mixing red and green marbles
14.Sublimation of dry ice
15.Crumpling a paper bag
16.Melting solid sulfur into liquid sulfur
17.Chopping an apple
18.Mixing salt and sand
19.Filling a candy bowl with different candies
20.liquid nitrogen
Examples of chemical change:
1. Burning of candle.
2. Making of curd from milk.
3. Dissolution of lime in water for white washing.
4. Formation of ash by burning wood
5.Dropping sodium into water
6.combustion (burning) of wood
7.metabolism of food in the body
8.cooking an egg
9.digesting sugar with the amylase in saliva
10.baking a cake
11.electroplating a metal
12.explosion of fireworks
13.rotting bananas
14.grilling a hamburger
15.milk going sour
16.Photosynthesis
17.Fermntation
18. Making popcorn
19.Lighting a matchstick
20.Riepening of fruits
Explanation:
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