Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

We Are the Rocks: The Rock Cycle

Sixth grade science....a look at types of rocks and the rock cycle.
by

Cindy Mullikin

on 10 November 2016

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of We Are the Rocks: The Rock Cycle

Igneous
What happened next you ask?
Dear Humans,

I have given a lot of thought about my life lately. I have watched many of you look at me and I can tell that you consider me rather ordinary. I can assure you that I am quite extraordinary. I have written down a few of my adventures that led to major transformations. After reading my memoirs, you will never look at a rock the same. My hope is that my memoirs will help you get a better understanding of all that occurs in the rock world. Did you know that the minerals that combine to make rocks have been here since the beginning of time? It is totally mind blowing! Rocks are never ending and always changing. Please give rocks the respect that they deserve. Rocks are the keepers of history. We are the Rocks!


Hope you enjoy,
Granite Sedimor


One day, I found part of myself exploding through a
fissure
(a crack in the earth's surface). I was
lava
! It was so exciting as I soared in the air. As I soared, I cooled from the molten mixture of the rock material and minerals of my ancestors. The part of me that rose above the Earth's surface became
obsidian
and
pumice
. I was now an extrusive igneous rock. How cool is that?
I started as magma.....split.....rose to the Earth's surface through a fissure... and now look at me.
It got really hot! The
pressure
was immense!
See that area? There's me and there's my friend, limestone. The
heat
from the
magma
and
pressure
from the above layers -- it
changed
both of us!
It was the extreme heat and pressure changed us into a metamorphic rocks.

Metamorphic
rocks are formed from extreme heat and pressure, and are classified by their properties of being
foliated
or
non-foliated.

As you can see, I am foliated. This means that
my mineral grains are lined up in parallel
bands or stripes.

But look what happened to my friend
limestone
. Boy is she beautiful.
Marble
here, is non-foliated, so you can see her mineral grains did not form layers.
I was so happy ! Time continued to go by and I was covered with more and more
sediments
. It got really heavy and after awhile, I no longer was just separate bits and pieces. I was cemented together to the other sediments. I was told that they call this
cementation
. The pressure of all those layers upon layers provided the means for
compaction
. Since I was mixed with some remains of
living
organisms.....I was called an
organic
sedimentary rock. I was limestone like my old friend. I even had fossils.
Here I am as a baby. You can call me
magma.
It was only about
4.5 billion
years ago that I was deep under the surface of the earth. It was very,very hot there. It was so hot that I existed only in liquid form. It was nice there as I flowed from place to place hidden under the surface of the Earth. Would you like to see my baby picture?
Igneous Extrusive
Rocks
Obsidian
Pumice
So cool......
Pumice floats!
I bet you are wondering what happened to the rest of me that stayed
underneath
the Earth's surface. Well, I will tell you. I cooled very, very slowly. I cooled so slowly that
crystals
were able to form. I must say I sure am pretty and so strong! I became an
intrusive
igneous rock. Many of you know me.... I am
granite
!
We are now
metamorphic
rocks. I am called
gneiss
and my friend, limestone, became
marble
.
I am super nice. Never take gneiss for granite my mom always says. I am even stronger now.
Notice I am

foliated!!!
(I have stripes)
I was hanging out for awhile with my sedimentary friend,
limestone
. We were very happy....but as you know, the one thing a rock can depend on is
change.
Metamorphic
I was gneiss for many years until
weathering
and
erosion
occurred. I was then met with catastrophic events...extreme winds, floods, landslides and even earthquakes.
I broke into bits and pieces. I was spread all around....carried from here to there. I was a mess of grains. Some small like
clay
, a bit bigger like
silt
, a bit bigger like
sand
, and the biggest of all like
pebbles
. It was kind of fun being all those sizes and moving all around, but I missed the prestige of being a rock. Finally I settled in one place. It was really boring for a long time. Thank goodness that I was met with more and more grains and sediments.
More
Change
What happened to the rest of my sediments?
Some of my finer bits dissolved into water. This allowed me to seep down under ground and into a cave
.
As time passed, the water
evaporated
and this part of me turned into
chemical
rocks. I was beautiful again.
Some of my bits were various sized minerals and they too went through
cementation
and
compaction
. I was a third type of sedimentary rock. I was called a
detrital
or
clastic
rock.
Sedimentary
Life of a Rock
Well, that is part of my story. I will still be here, ever changing for 4.5 more billion years. My friends and I have a theme song. It is called, We Are the Rocks. When you sing it, think of me. Remember.....Rocks Rule!

Of course! Rocks are the kings and queens of change.
We are the Rocks
Full transcript