Physics
Answer
The simple activity to show that molecules have spaces between them is given below :
Aim : To demonstrate the presence of spaces between particles of matter
Materials Required : A measuring cylinder (100 mL), a glass rod, powdered sugar, a spoon and water
Procedure :
- Take 100 mL water in a measuring cylinder and mark the level of water.
- Dissolve some powdered sugar in it with the help of a glass rod as shown below.
Observation : You will observe that even though the sugar has dissolved, the water level is same as before.
Conclusion : This activity shows that when sugar is dissolved in water, its molecules go into the spaces present between the water molecules. Due to this, there is no change in the water level when sugar is added to it. Hence, spaces are present between molecules of matter.
Related Questions
Explain the changing states of matter by taking the example of water.
Compare the characteristics of solids and liquids.
Write a note on composition of matter.
Harsh's mother asked him to close the knob of the gas stove after use, but he forgot. After some time, his mother observed a smell of rotten cabbages in the whole house. She went to the kitchen and saw that the knob was still open. She closed it immediately. Later, she made Harsh understand that it is very dangerous to keep the knob of the stove open, as it can catch fire.
(a) Which characteristic of gas is responsible for this smell in the whole house?
(b) Name the gases that a gas cylinder usually contains.
(c) Is it possible to keep solids and liquids compressed in a cylinder?
(d) What precautions should we follow to avoid any mishaps in the kitchen?
(e) What would you do in such a situation?