Rocks and Rock Cycle
Rocks are composed of minerals and
have many various properties.
Luster tells how shiny a rock is.
Streak is the attribute of a rock after it is
grounded into powder form.
The Rock Cycle is a set of transformations
that a rock undertakes.
Igneous rock can transform into sedimentary
rock or into metamorphic rock.
Sedimentary rock can change into
metamorphic rock or into igneous rock.
Metamorphic rock can become igneous or
sedimentary rock.
The formation of igneous rocks happens
when magma cools and makes crystals. The
hot liquid formed of melted minerals is
called magma.
Igneous rock can form subterranean, where
the magma cools at a slow pace
Igneous rocks can form above earth,
where the magma cools rapidly.
Magma is called lava when it pours out
on Earth's surface. It is the same liquid
rock matter that is seen coming out of
volcanoes.
Water and wind can break rock into pieces
on the earth's surface. They can also
transport rock pieces to another location.
The rock pieces called sediments, drop from
the water or wind to make a layer.
All rocks can be heated.
When the hands are clasped hard, it gives the
sensation of heat just like the pressure inside earth
which builds up heat
There is heat from friction when hands are rubbed
together and the heat is felt.
The high temperature of the rock bakes the
rock. Baked rock does not melt but it does
transform. Baked rock forms crystals and
if it has crystals already, it forms larger
crystals. Because this rock transforms, it
is called metamorphic.
The rock cycle continues to occur on the
planet. Mountains made of metamorphic
rocks can be broken up and washed away
by streams. New sediments from these
mountains can make new sedimentary
rocks.
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How does the rock cycle affect the Earth?
How does sedimentary rock change into igneous
rock?
What makes certain rocks valuable?
What are the different properties of minerals?
Are all rocks considered minerals? Why do you say
so?