External skeleton is the correct answer. Hope this helps out !
Phase change is the change in state. i.e. water to steam or ice to water
Answer:
intrusive igneous rocks cool from magma slowly because they are BURIED beneath the surface extrusive igneous rocks cool from lava rapidly because they form at the surface and the meaning of those words are simple intrusive means inside of something like interior and extrusive means outside which is like exterior
<span>Most of the energy released by nuclear fission is in the form of gamma rays.
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