Define Brownian movement.
The zig-zag motion of particles is known as Brownian movement.
CH 3 MATTER
Define diffusion.
The intermixing of particles of one kind with another kind is known as diffusion.
Define cohesive force.
The force of attraction between the particles of the same substance is known as cohesive force.
Liquids and gases flow but solids do not ?
The molecules of liquids and gases are far apart as compared to solids, hence liquids and gases can flow but solids do not have gaps so they can’t flow.
What are fluids ? Give two examples
Substances which can flow are known as fluids. Both gases and liquids are fluids, e.g. gases (O2, CO2), liquids (H2O, petrol ).
Name the three states of matter.
The three states of matter are : – Solid state LIquid state Gaseous state
Give one difference between atoms and molecules.
Atoms may or may not have independent existance but molecules have independent existence.
What are molecules?
Molecules are the smallest unit of matter and has the capability of exsisting indepently.
Differentiate between living and non-living matter.
Living matter:- Anything that can grow, move and reproduce on their own is called living matter . It is natural Non-living matter:- Anthing that does not grow, move or reproduce on its own that is known as non-living matter. It can be natural or man made.