Question

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Answer 1

Answer:

Kilograms

M3, cm3

A substance that occupies space

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Answer 2

Explanation:

1). The SI unit of mass is the kilogram (kg).

2). the SI unit of volume is the cubic metre (m3).

3). Anything that has mass and occupies space is called matter.”

4).Matter is made up of very small particles: All matter is made up of very small particles .We can prove this by performing the following experiment: Take two or three crystals of potassium permanganate and add in 100ml of water. We will see that the colour of the water gets changed.

5).Even two-three crystals of “potassium permanganate” can impart colour to a “large volume of water” due to the natural phenomenon of diffusion. Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration down the concentration gradient.

6).Physical properties of matter- Matter is made up of particles which are very small in size. Everything around us is made up of tiny pieces or particles. The particles of matter are constantly moving (they are in motion). The particles which make up matter are atoms and molecules.

7). When 2ml of Dettol is dissolved in 100 ml of water, it denotes that a uniform mixture is produced or a true solution is obtained. Further, the solution becomes white in colour, and the smell can be detected even on a repeated dilution.

8). There are several examples that show particles of matter are constantly moving: - The smell of food being cooked in the kitchen reaches us even from a considerable distance. - The smell of perfume spreads due to the diffusion of perfume vapours into the air.

9).Sponge is a solid yet we able to compress it because it has holes in it. When we compress the sponge the air goes out of those pores.

10). The rate of diffusion of liquids higher than that of solids because liquids have higher inter-particle space than solids. This leads to higher fluidity than solids as the particles in a liquid are not as closely packed as in case of solids.

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