With the help of activity , show particulate nature of matter
Answers
Explanation:
a) Take a 100 ml beaker.
(b) Fill half the beaker with water and mark the level of water.
(c) Dissolve some salt / sugar with the help of a glass rod.
(d) Observe any change in water level.
Observation : Level of water remains same and salt / sugar, has now spread throughout water. When we
dissolve salt in water, the particles of salt get into the spaces between particles of water. This shows the particulate nature of matter.
Two characteristics of particles of matter are
(i) They have space between them.
(ii) They are continuously moving.
(iii) They attract each other.
Answer:
Take about 50 cm3 water in a 100 cm3 beaker.
2. Mark the level of water.
3. Add some sugar to the beaker and stir with the help of a glass rod.
4. Observe the change in water level.
Fig. 4.1. Dissolution of sugar in water. In solution particles of sugar are present in the spaces between particles of water
It is observed that the crystals of sugar disappear. The level of water remains unchanged. These observations can be explained by assuming that matter is made up of small particles. On dissolution, the particles of sugar get distributed into the spaces between particles of water.
• The constituent particles of matter are extremely small in size
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The following activity demonstrates that the constituent particles of matter