Question

specify two differences between internal and external forces​

Answer 1

Answer:

internal forces take place inside the earth crust while external forces are done by water ,air etc.. 

internal forces are done when the rock plates move inside earth or show movement external forces are done when there is pressure of water, air etc..

mostly Mountains are made because of internal forces..

hope this helps you

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Answer 2

Answer:

Internal force are the force that emanate from within a system. The system must be defined by your/problem.External forces are the forces that emanate from outside. Action or reactions force has no difference.