Question

define the terms a) focus and b) epicentre
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Answer 1

Answer:

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Explanation:

Focus is the point where the edges of the plates give way resulting in sudden movement which causes earthquake.

Whereas epicentre is point just above the focus on the earth surface.

Answer 2

• Focus: The place in the crust where the movement starts.
• Epicentre: The place on the surface above  the focus.