Transcript Story In the rocks - NagelBeelmanScience


Weathering is a chemical process that causes
exposed rock to be decomposed. There are
two types of weathering, chemical and
physical. Chemical weathering involves a
chemical change in some of the minerals in
the rock. Physical change involves breaking
the rocks into fragments. The Grand canyon
was formed by the water weathering the
rock.

Erosion is a process were the surface of the
earth is worn away by water, glaciers winds
and waves. The difference between
weathering and erosion is weathering has no
movement. Sediment is broken down rock
and minerals. It’s related to deposition
because is moving sediment to different
places. The main agent of erosion is moving
water. One type of erosion is sheet erosion
which is loose soil removed by water in a
sheet. Eroded material slides downhill
because of water flowing. Also Gravity, a
force that keeps things on the ground keeps
the erosion and weathering going.

The rock cycle is a process where rocks are
formed, altered, and destroyed by a
geological process. There are three types of
rock sedimentary, igneous and metamorphic.
Igneous rocks are formed when magma is
cooled and hardened. Metamorphic rocks
are rocks that have morphed under heat and
pressure. Sedimentary rocks are sediment
packed together into rocks. It normally forms
in layers.

Fossils are animal and plants in rock.
They are most likely found in sedimentary
rocks. Fossils are formed over millions of
years when dead organisms are trapped
in rock. They are a trace of a living thing
from a past age.

Superpostion is a law that says rock that
is younger will be deposited on top of
rock that is older. If two layers are laid
down the newer one will be on top. If
there were fossilized shark teeth on a hill
you could probably infer that there was
once an ocean there at one point.

The Geologic time scale
is a system of
measurements relating
to events that have
happened on earth. It
divides earths history
into periods called eras.
www.nature.nps.gov/geology/usgshp/misc
/gweaero.html
www.watersheds.org/earth/erosion.htm
www.awnsers.com/topic/sheet-erosion
http://en.wikipedia.org/wiki/erosion
http://scienceguy288.wordpress.com/2008
/01/29/north-america-trip-i/the/grandcanyon/
http://dictonary.com
http://imnh.isu.edu/digitalatlasics/geo/basics/dia
grams.htm
http://www.fi.edu/fellows/fellowl/oct98/create/m
etamorph.htm
www.wikipedia.com
http://money.cnn/2007/12/13/smbusiness/fossils.fs
b/index.htm
http://www.gsa.org.au/resorces/factitesrocks.paf
http://www.enchantedlearning.com/subject/ge
oloictime.html
www.dictonary.com