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ROCKS
- Weathering
and erosion
- Weathering is when a
physical or chemical process
which wears away or breaks rocks
into smaller fragments
- PHYSICAL
WEATHERING: Onion
skin weathering. Rock:
when its hot will
expand then when it
cools down it goes
back to normal then
when it heats up it
goes to room temp
- PHYSICAL WEATHERING: Freeze thaw. When
a cracked rock gets water inside and
the water freezes to form ice. The ice
expands and then cracks the rock off
- CHEMICAL WAETHERING : An
example is acid rain it dissolves
into the rock and creates holes
- BIOLOGICAL WEATHERING: Roots and
shoots grow through cracks in rocks
causing them to break
- PHYSICAL
WEATHERING: Onion
skin weathering. Rock:
when its hot will
expand then when it
cools down it goes
back to normal then
when it heats up it
goes to room temp
- Weathering is when a
physical or chemical process
which wears away or breaks rocks
into smaller fragments
- Metamorphic rocks: these are
formed by rocks under heat
and pressure, in other words
they are previously rocks which
have changed into metamorphic
rocks
- Igneous rocks: these are
rocks that are formed when
magma cools down
- Sedimentary rocks:
these are formed
when igneous rocks
are weathered and
eroded and grains
compact and
cement them
together forming
layers
- Sedimentary rocks:
these are formed
when igneous rocks
are weathered and
eroded and grains
compact and
cement them
together forming
layers
- Igneous rocks: these are
rocks that are formed when
magma cools down
- Igneous rock:
GRANITE
- METAMORPHIC
ROCKS: Marble,
Quartize
- Sedimentary
rocks: sand,
limestone,
chalk and
clay
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