formation
how is metamorphic rock formed?
existing rock that put under heat and pressure
magma
molten rock inside the earth
clastic
rocks composed of broken pieces of older rocks
texture depends on the size and shape of the mineral crystals
true
what are the 3 types of rocks
igneous, metamorphic, sedimentary
how is extrusive igneous rock formed
formed when magma rises through cracks in the earths crust(turning into lava), cools, and crystalizes
rock cycle
series of natural processes by which rocks are slowly changed from one kind of rock to another
crystaline
having the structure and form of a crystal; composed of crystal
magma that cools slowly forms small crystals
true
when a rock is melted and then cooled what is it
a worm
how is sedimentary rock formed
pieces of smaller rocks that are cemented together
texture
look and feel of a rocks surface
inorganic
cannot be formed from materials that were once living
extrusive rocks tend to have larger crystals
false
true- tend to have larger crystals
when magma cools quickly can there be no crystals at all
yes
how is intrusive igneous rock formed
magama hardens beneath the earth's surface
foliated
texture of a metamorphic rock that has mineral crystals arranged in bands
rocks
mix of minerals usually cemented together
conglomerates are made of long a spikey rocks
false
true- made up of round pebbles and gravel
what does crystal size depend on
amount of time the molten rock cooled
which kinds of rock can change into sedimentary rock
all
sediment
bonus- what carries away and deposits sediment
^if you got the bonus right you get an extra 500
sediment is rock particles carried away and deposited by wind, water, or ice
grain
particles of minerals and other rocks that make up a rock
magma with high silica content forms darker rocks
false
true- forms lighter rocks
how can geologists classify weather a rock is igneous or not
their origin, texture, and mineral composition