Isostacey is a state of balance that exists between the Earths crust & the denser rock material beaneth it. This is important to know beacause it helps us to infer what the Earth beneath the crust is made of & what state of matter it is in. It also
Buoyancy Is ability or tendeney to floate in water or air or some other fluid. The power of a liquid to keep something afloat. Figurative an optimistic nad cheerful disposition. The happiness and buoyancy if it's nature. Figuartive a high level of activity in an economy or stock market. There is renewed buoyancy in the demand for steel.