Question

what is the meaning of crust,mantle and core?

Answer 1

The interior structure of the Earth is layered in spherical shells, like an onion. These layers can be defined by their chemical and their rheological properties. Earth has an outer silicate solid crust, a highly viscous mantle, a liquid outer core that is much less viscous than the mantle, and a solid inner core.

Answer 2

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• Crust => ɪᴛ ɪs ᴛʜᴇ ᴏᴜᴛᴇʀᴍᴏsᴛ ʟᴀʏᴇʀ ᴏғ ᴛʜᴇ ᴇᴀʀᴛʜ's sᴜʀғᴀᴄᴇ. ɪᴛ ᴇxᴛᴇɴᴅs ғʀᴏᴍ 5 ᴛᴏ 8 ᴋɪʟᴏᴍᴇᴛʀᴇs ʙᴇɴᴇᴀᴛʜ ᴛʜᴇ ᴏᴄᴇᴀɴs ᴀɴᴅ ᴀʙᴏᴜᴛ 35 ᴋɪʟᴏᴍᴇᴛʀᴇs ʙᴇɴᴇᴀᴛʜ ᴛʜᴇ ᴄᴏɴᴛɪɴᴇɴᴛᴀʟ ᴍᴀssᴇs.
• Mantle => ɪᴛ ɪs ᴛʜᴇ ʟᴀʏᴇʀ ᴛʜᴀᴛ ʟɪᴇs ʙᴇʟᴏᴡ ᴛʜᴇ ᴄʀᴜsᴛ. ᴛʜᴇ ᴛʜɪᴄᴋɴᴇss ᴏғ ᴍᴀɴᴛʟᴇ ɪs 2,900 ᴋɪʟᴏᴍᴇᴛʀᴇs.
• Core => It is the innermost layer of the Earth  and is 3,500-kilometres thick.