Underground - Jolly Phonics Level 3 Readers
The ground under our feet seems solid
and hard, but in fact there are lots of
things under it.
We live on a planet called Earth, which
was formed a long time ago. The Earth
is round in shape,
like a ball. It is
covered by a thin crust of rock.
Rock is made up of things called minerals.
This is one sort of rock, called granite.
You can see the different minerals in the
granite.
This building is made from a sort of
rock called limestone. Limestone is good
for building things as it is strong and
can be carved into shapes.
Where limestone is found, there are
often underground caves and holes.
These are made by rain. Little by little,
the rain digs caves and tunnels into the
rock.
As the rain drips,
it mixes with some of
the minerals from the limestone and
together they form columns in the
caves. The columns that hang down are
called stalactites and those that stick up
are called stalagmites.
Explorers investigate underground caves
and tunnels. They need hard hats,
torches and sometimes ropes.
Oil and gas are found under the
ground. A long time ago, very small
animals died and bit by bit they sank
deep down into the earth. Little by
little, mud and sand collected on top of
them. When the animals'
remains had
been mixed with the mud and sand for
a long time, they ended up forming oil
and gas.
Coal can be found under the ground
too. Coal is what is left from trees that
died and rotted a long time ago. We
dig down into the ground to get the
coal out. The hole we dig to do this is
called a mine.
Tunnels with roads and tracks are built
under the ground for cars and trains to
travel along. Some of these tunnels go
under rivers and some go from country
to country.
Much of the rock that covers the Earth
is topped with a thin coating of soil.
Some animals can dig down into the
soil and make homes underground.
Where there is no soil, the land is just a
rocky desert.
Tree roots go down into the ground
too. The roots keep the trees steady
and stop them from falling down. Trees
use roots to take in food from the soil
as well
We get some of our food from under
the ground.
A long time ago, animals like these used
to live on the Earth.
The bones, teeth and eggs of these
animals have been found in some very
old rocks. Sometimes you can just see
the shape where they used to be in the
rock. Rocks like these are called fossils.
Under the ground are all sorts of things
that have been left from times gone
by. There are coins, bits of pottery and
sometimes old houses! When they are
found, they can be dug up and used to
help us understand what life was like
back then.
So next time you look down, think about
all the things that are found under the
ground.
https://drive.google.com/file/d/1V1G5I9ZNdmCf1XHW0CV1xmMx2W7W-kzN/view?usp=drivesdk
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