Differentiation between static and dynamic RAM

Question

Explain differentiation between static and dynamic RAM?

Answer 1

Static RAM:

No refreshing, 6 to 8 MOS transistors are needed to make one memory cell, Information stored as voltage level in a flip flop.

Dynamic RAM:

Refreshed periodically, 3 to 4 transistors are needed to make one memory cell, Information is stored like a charge in the gate to substrate capacitance.