2. What are Volcanoes?
Volcanoes are mountains that
open downwards to molten
rock under the earths crust. If
to much pressure builds up
then it becomes an eruption.
In the process of the eruption
gases and rock shoot out and
sometimes fills the air with
lava fragments. This explosion
can cause tsunamis,flash
floods and earthquakes.
3. Why do they erupt?
The earths crust is made up
of slabs called plates.
These slabs fight like a
jigsaw puzzle. Once in a
while they move. The friction
of the movement causes the
volcanic eruption near the
edge of the plates. This
theory explains the process
and gives the name tectonic
plates to slabs.
4. Different types
There are many types of volcanoes.
The first one is a caldera. This volcano used to be big
and strong, but erupted so fiercely that the sides cave
down and became a crater. Did you know that Lake
Taupo is one of these calderas and it's still active! The
second is called a stratovolcano also known as a
composite volcano. These volcanoes are made up of
many ingredients, such as, hardened lava, volcanic
ash, pumice and tephra here are some photos..........
5.
6.
7. How it would affect
people?
This photo is people that got turned to
stone from a volcano ~> ~> ~>
From my perspective getting turned to
stone from a volcano is scarier than
presenting my speech in front of the
whole school, but what I don't get is
that people like volcanologists think it is
exciting to be inside a volcano that
would erupt at any minute! Volcanoes
can also destroy villages and lives. But
the benefit is that it gives fertile soil!
8. Where they occur?
Volcanoes occur close to major
tectonic plate boundaries and
sometimes are located by
Earth's plate boundaries. It is
very rare to have an eruption in
Australia because it's nowhere
near the ring of fire. Volcanoes
can remain inactive for
hundreds to thousands of years!
9. What is the
Ring of fire?
The ring of fire is
where the tectonic
plate boundaries are.
When the tectonic
plates hit each other or
pulls away from each
other or even rubs
against each other this
very movement can
cause all sorts of
disasters and can lead
to a lot of damage!
10. Thank you for watching!
Hope you learnt some thing new
