Question

what is a speed?? what is a matter??

Answer 1

In everyday use and in kinematics, the speed of an object is the magnitude of its velocity (the rate of change of its position); it is thus a scalar quantity.[1] The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval;[2] the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero.

matter is anything that occupies space and has mass and can be perceived  by our senses.

Answer 2

Here is your answer.

Speed
Rate at which an object changes it's position is called speed.

Matter
Anything which has mass and occupies some space and which can felt by any of our five sense organ.example
Air,Book,etc

Hope it helps you