Question

1.- Why does heating leads to expansion of matter?​

Answer 1

Answer:

When a material is heated, the kinetic energy of that material increases and its atom and molecules move about more. This means that each atom will take up more space due to its movement so the material will expand.

Hope it helps you!!

Answer 2

Answer:

All three states of matter (solid, liquid and gas).

Explanation:

AS WE KNOW THAT THE MATTER IS MADE UP OF SMALL PARTICLES WHICH PACKED WITH THE HELP OF SOME FORCES AND THERE IS SOME  KINETIC ENERGY OF THE PARTICLES WHICH OPPOSE THE FORCE OF ATTRACTION BUT WHEN WE GIVE ENERGY IN THE FORM OF HEAT THAN THE KINETIC ENERGY OF THE PARTICLES BECOME HIGHER THAN EVEN BEFORE AND NOW THEY OPPOSING THE FORCE OF ATTRACTION MORE THAN THE BEFORE WHICH LEDS TO THE EXPANSION OF THE MATTER.