Why is the earth considered a dynamic planet? what are its three concentric layers and there properties?

Yes, earth is a dynamic planet and the three concentric layer are core, mantel and crust.

Explanation:

Earth is a dynamic planet as it changes regularly, and this dynamism is a product of the earth rotation on its axis and a regular flow of energy from the internal to the external surface of the earth. Earth being formed about more than 4.5 billion years ago. The formation has created various layers of within the earth so dynamic that they need to be understood by modelling the earth. Earth is itself a form of geoid and is composed of rare earth and various other life-supporting elements that are not found on other planets to date. Earth's three concentric layers namely Core, Mantle, and Crust are all wrapped around layers of rocks that have transition layers separated by some discontinuity zones.  The crust has a composition of lighter silicic rocks, composed of both continental and oceanic rocks of different ages, similarly, the mantel is composed of molten rocks that in their due course of time have solidified to form the upper and lower mantle. There thickness changes with varying depths.  The core is made up of rock that has heavy metals like nickel and iron and also divided into the inner and outer core with varying densities of 9900 to 12,200.