Question

1. DO AS DIRECTED :-

(a)Crustal plates float over ___.[Fill in the blank]
(b)In case of convergence, some portion of submerged plate starts melting after entering the Asthenosphere.[True/False]
(c)Conduction current develops due to upward flow of hot molten materials of Earth's interior.[True/False]

2. ANSWER THE FOLLOWING QUESTIONS :- [Each carries 2 marks]

(a) What are crustal plates and state its nature very briefly?
(b)Discuss the phenomenon for the formation of oceanic crust & mid- oceanic ridges.
(c)Why are the crustal plates dynamic?
(d)What is epicentre of an earthquake?
(e)State briefly the two types of surface waves of an earthquake.​

Answer 1

Answer:

1.a) Crustal plates float over the water