Question

what is rocks mention any four characteristics of metamorphic rocks​

Answer 1

Answer:

Rocks are an aggregate of mineral elements. that is, they are formed of different types of minerals. Rocks don't have a fixed chemical composition. There are 3 types of rocks:

1. Igneous rocks
2. Sedimentary rocks
3. Metamorphic rocks

CHARACTERISTICS OF METAMORPHIC ROCKS:

• They are harder and more compact than their original form.
• Metamorphic rocks were once igneous or sedimentary rocks, but have been changed (metamorphosed) as a result of intense heat and/or pressure within the Earth’s crust. Thus, formed when the original rocks are subjected to high temperatures and pressures.
• They are crystalline and some have a foliated or banded texture
• Chemical changes or structural modification to the minerals making up the rock can happen.

Answer 2

$\huge\star{\underline{\mathtt{\red{A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R}}}}\huge\star$

• $\small{\underline{\mathcal{\red{Definition-}}}}$ᴀ ʀᴏᴄᴋ ɪs ᴀɴ ɪɴᴏʀɢᴀɴɪᴄ, sᴏʟɪᴅ ᴀɴᴅ ɴᴀᴛᴜʀᴀʟ sᴜʙsᴛᴀɴᴄᴇ ᴡɪᴛʜᴏᴜᴛ ᴀɴʏ sᴘᴇᴄɪғɪᴄ ᴀᴛᴏᴍɪᴄ sᴛʀᴜᴄᴛᴜʀᴇ ᴏʀ ᴄʜᴇᴍɪᴄᴀʟ ᴄᴏᴍᴘᴏsɪ -ᴛɪᴏɴ. ɪᴛ ɪs sɪᴍᴘʟᴇ ᴛᴏ ʀᴇᴍᴇᴍʙᴇʀ ᴛʜᴀᴛ ʀᴏᴄᴋs ᴀʀᴇ ᴍᴀᴅᴇ ᴜᴘ ᴏғ ᴛᴡᴏ ᴏʀ ᴍᴏʀᴇ ᴍɪɴᴇʀᴀʟs.

• $\small{\underline{\mathcal{\purple{ᴇﾒᴀᴍᴘʟᴇ:-}}}}$ʟɪᴍᴇsᴛᴏɴᴇ, ɢʀᴀɴɪᴛᴇ, ᴍᴀʀʙʟᴇ, sʟᴀᴛᴇ ᴀɴᴅ sᴀɴᴅsᴛᴏɴᴇ.

⠀⠀⠀⠀ｲʏᴘᴇs ᴏғ Rᴏᴄᴋs

ᴛʜᴇʀᴇ ᴀʀᴇ ᴛʜʀᴇᴇ ᴛʏᴘᴇs ᴏғ ʀᴏᴄᴋs:

⠀$\small{\underline{\mathcal{\blue{ɪɢɴᴇᴏᴜs \:\:Ʀᴏᴄᴋs }}}}$

⠀$\small{\underline{\mathcal{\orange{ ֆᴇᴅɪᴍᴇɴᴛᴀʀʏ\:\:Ʀᴏᴄᴋs }}}}$

⠀$\small{\underline{\mathcal{\gray{ ᴍᴇᴛᴀᴍᴏʀᴘʜɪᴄ\:\:Ʀᴏᴄᴋs }}}}$ ⠀⠀⠀⠀⠀⠀⠀⠀

⠀ ⠀$\pink{ \tt{ᴛʜᴇ\:匚ʜɑʀɑᴄᴛᴇʀɪsᴛɪᴄs\:ᴏғ\:}}$⠀⠀⠀⠀$\green{\bold{\underline{\underline{ᄊᴇᴛɑᴍᴏʀᴘʜᴄ \:ʀᴏᴄᴋs\: ɑʀᴇ:}}}}$

• They ɑre hɑrder ɑnd more compɑct thɑn the originɑl igneous rocks.For exɑmple mɑrble is hɑrder thɑn limestone.

• Most of the rocks ɑre impermeɑble I e they do not ɑllow wɑter to percolɑte through the rocks.

• They do not hɑve fossil fuels ɑs fossil fuels ɑre destroyed during the formɑtion of igneous rocks.

• They ɑre formed due to ɑ chɑnge in texture ɑnd colour thɑt ɑrise from the pre existing cells.

• New minerɑls ɑre formed during the course of metɑmorphism.

───────────◇◆◇───────────