Explain what might would lead to an increase in plate speed. Your answer should explain how each of the following would come into play in order to cause such an increase in speed: 1) Increasing temperature of Earth's core 2) Decreasing density of the material that makes up earth's mantle 3) Speed/amount of mantle material rising and sinking 4)

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.