Question

what are plate tectonics and how the are formed

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Answer 1

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ᴘʟᴀᴛᴇ ᴛᴇᴄᴛᴏɴɪᴄs ɪs ᴀ sᴄɪᴇɴᴛɪғɪᴄ ᴛʜᴇᴏʀʏ ᴛʜᴀᴛ ᴇxᴘʟᴀɪɴs ʜᴏᴡ ᴍᴀᴊᴏʀ ʟᴀɴᴅғᴏʀᴍs ᴀʀᴇ ᴄʀᴇᴀᴛᴇᴅ ᴀs ᴀ ʀᴇsᴜʟᴛ ᴏғ ᴇᴀʀᴛʜ's sᴜʙᴛᴇʀʀᴀɴᴇᴀɴ ᴍᴏᴠᴇᴍᴇɴᴛs. ɪɴ ᴘʟᴀᴛᴇ ᴛᴇᴄᴛᴏɴɪᴄs, ᴇᴀʀᴛʜ's ᴏᴜᴛᴇʀᴍᴏsᴛ ʟᴀʏᴇʀ, ᴏʀ ʟɪᴛʜᴏsᴘʜᴇʀᴇ—ᴍᴀᴅᴇ ᴜᴘ ᴏғ ᴛʜᴇ ᴄʀᴜsᴛ ᴀɴᴅ ᴜᴘᴘᴇʀ ᴍᴀɴᴛʟᴇ—ɪs ʙʀᴏᴋᴇɴ ɪɴᴛᴏ ʟᴀʀɢᴇ ʀᴏᴄᴋʏ ᴘʟᴀᴛᴇs.

Answer 2

Answer:

a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.

Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries (or faults). ... Tectonic plates are composed of the oceanic lithosphere and the thicker continental lithosphere, each topped by its own kind of crust.