What is matter? what are the three kinds if matter​

Matter is a substance that has inertia and occupies physical space. According to modern physics, matter consists of various types of particles, each with mass and size. The most familiar examples of material particles are the electron, the proton and the neutron. Matter can exist in several states, also called phases.

There are three states of matter: solid; liquid and gas. They have different properties, which can be explained by looking at the arrangement of their particles

conduction, convection, radiation

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.