Solid particles have definite shape and volume with little space in between. The molecules move but very slightly. They are tightly packed and have strong intomeleclar forces.
Liquids have a definite volume but not a definite shape. Liquids have a small amount of space between the particles. Liquids also are affected by intermolecular forces of diffrent strengths.
Gases are composed of a large number of particles that behave like hard, spherical objects in a state of constant, random motion.These particles move in a straight line until they collide with another particle or the walls of the container.These particles are much smaller than the distance between particles. else.
There is no force of attraction between gas particles or between the particles and the walls of the container.Collisions between gas particles or collisions with the walls of the container are perfectly elastic. None of the energy of a gas particle is lost when it collides with another particle or with the walls of the container.The average kinetic energy of a collection of gas particles depends on the temperature of the gas and nothing else.
As the temperature in a substance increases so does the particle movement. If the temperature in water was to increase the particles would move more. If it was cooled down then the particles would move less and act like a solid.
If you add heat to a solid it will become a liquid, and heat to a liquid and it will become a gas and if you add heat to a gas it becomes more energetic.
The different states of matter are solid liquid and gas. In a solid, the particles are tightly packed in a regular pattern with little movement, Liquid are close together but without a regular pattern and can move past each other. In a gas, the particles are dispersed and move at high speeds with no regular pattern.