rocks Flashcards
What is at the centre of the Earth?
The core is at the centre of the Earth. An example is granite
how are igneous rocks formed
they are formed from magma melted underground
how are sedimentary rocks formed
they are formed from layers of sediment rock fragments or dead matter. an example of it is a rock salt.
how are metamorphic rocks form
they are formed of heat and increased pressure on a existing rocks over a long period of time. an example is marble.
what is a extrusive rock
Extrusive rock is formed from lava, magma that cools quickly on the surface.
what is an insrusive rock
Intrusive rock is formed when hot molten magma is forced into small cracks between layers of other already existing rock types.
what is weathering
weathering is when rocks are broken it smaller ones
what is erosion
erosion is when wearing the rock eg rain
what is transportation
transportation is when moving the eroded bits of rock
what is deposition
laying down of sediment
what is burial
squeezing and compressing they layers eventually they from sedimentary
what is heat
further squashing and heating turns the rocks into metamorphic rocks
what is melting
intense heating makes the rock partially melt
what is cooling
solidification of the molten rock form to igneous rocks
what is exposure
the amount of rock on the surface is always about the same even though its weathered.
sediment is
Small fragments of rock and soil.
