Transcript What are rocks?

What are rocks?
Rock is the hard, solid material that makes the
Earth. It is everywhere. Mountains are great
masses of rock. Stones and pebbles are small
pieces of it. In fact, Earth itself is a great ball of
rock weighing about 6.6 sextillion tons.
A igneous rock is formed by cooling magma below
earths surface . It is a volcanic rock. They are formed
by lava flows, ash, and blocks blown from volcanoes.
What is an extrusive igneous
rock?
Extrusive igneous rocks are rocks that form
when melted rock material cools and
hardens above the ground .some examples
are Rhyolite, Obsidian, and Basalt.
I’m going to be recognizing two different
sedimentary rocks. The first is shale.
Shale is a fine grained stone made from
compacted mud. Shale is used to make
pottery, china, tile and bricks.
The second is sandstone. Sandstone is
made from quarts that are held together by
cement, and often used to make buildings.
What is obsidian and how is it
formed?
Obsidian is a rock formed by volcanic
ash.
What is basalt and how is it?
Basalt is dark, dense, and hard, and has a unusually texture so
fine-grained that indivual crystals cab be only seen under
microscopes.
What are intrusive rocks
Granite and Gambro are examples of
intrusive rocks. Intrusive rocks are
cooled below the ground.
What is limestone and how is it
formed?
Limestone is a sedimentary rock
mostly made of mineral calcite
Limestone is formed by shells and
bones . that comes from tiny sea
animals.
Gambbro
What are sedimentary rocks?
Sedimentary rocks are formed by
eroison.
Name and describe sedimentary
rocks
Sedimentary rocks, rocks formed by
the consolidation of ancient
sediments derived from the fragment
Where does soil come from?
Soil comes from a mixture of solid
particles ,air, and water. Some
particles are made of bits of broken
down rocks.
What is metamorphic
rock?
Rock that is changed by heat or
pressure is called metamorphic . Both
igneous rock and sedimentary rock can
be changed to metamorphic rock. In fact
metamorphic rock itself can be changed
to other types of metamorphic rocks.
How can we protect our soil?
We need to protect our soil because we grow our food and
our animals live under or in the soil. We can protect our
soil by not spilling dangerous chemicals on the ground.
We can also stop digging up the ground. We need to stop
doing dangerous things to the ground.
What is limestone and how is it
formed?
Limestone is a sedimentary rock
mostly made of mineral calcite
Limestone is formed by shells and
bones . that comes from tiny sea
animals.
How does coal from
Coal comes from ancient bogs deep
out of the ground. Coal can be used
for roads and to kill bugs.
Metamorphic Rocks
They produced by the alteration of
igneous or sedimentary rocks through
changes in temperature and pressure
What is granite?
Granite is a light colored plutonic rock found
through out the continental crust, most
commonly Mountains areas
What are Soil Horizons?
The chunks weather into smaller pieces.
Living things die and decay and form humus.
Gradually layers of soil, or soil horizons,
develop.
What is slate?
Slate was once the
sedimentary rock shale . It is
formed with heat and pressure.
what is the rock cycle?
What is rhyolite
Rhyolite is a white fine grain volcanic
rock .feldspar glassy matrix iron. Rhyolite
tens to be very viscous because of it high
silica. Gas rich erupts violently to form
welled tuffs, or ignimbrites and may
speared out great distance.