1. Ms. Cormican
3rd Grade Science

2. Definitions
 ash cloud - an ash cloud is the cloud of ash that
forms in the air after some volcanic eruptions.
 conduit - a conduit is a passage through which
magma (molten rock) flows in a volcano.
 crust - the crust is Earth's outermost, rocky layer.
 lava - lava is molten rock; it usually comes out of
erupting volcanoes.
 magma chamber - a magma chamber contains
magma (molten rock) deep within the Earth's
crust.side vent - a side vent is a vent in the side of a
volcano.
 vent - a vent is an opening in the Earth's surface
through which volcanic materials erupt.

3. What is a volcano?
 A volcano is a vent
or 'chimney' that
connects molten
rock (magma) from
within the Earth’s
crust to the Earth's
surface.
 The volcano includes
the surrounding
cone of erupted
material.

4. 3 Types of Volcanoes
 Shield Volcanoes
 Cinder Cone Volcanoes
 Composite Volcanoes
 These volcanoes get their name b y the
way they are shaped and what they are
made of.

5. Shield Volcanoes
 Are built almost
entirely of fluid
lava flows.
 Flow after flow
pours out all
directions in this
volcano.
 The Hawaiian
Island are
composed of
chains of these
volcanoes.

6. Take a look at this Shield
Volcano!

7. Cinder Cone Volcanoes
 Simplest types of
volcano.
 Have a bowl
shaped crater at the
top and rarely rise
more than a
thousand feet or so
above their
surroundings.
 Many are found in
western North
America.

8. Take a look at this Cinder Cone
Volcano!

9. Composite Cone Volcanoes
 Develop from
repeated explosive
and non explosive
eruptions.
 These volcanoes are
the largest !
 St. Augustine in
Alaska is an
example of
composite cone.

10. Look at this Composite
Volcano!

11. How Volcanoes Erupt!

12. Interesting Facts
 Indonesia has the most active volcanoes in the
world.
 The word volcano comes from an ancient god
named Vulcan.
 Mars has the largest volcano solar system.
 There are over 1900 active volcanoes on
Earth
 Mauna kea is the tallest volcano in the world.
 Volcanoes are on land and in sea.
 Volcanic eruptions feature ash, rock, gases,
and lava!

13. What to think about…
 Vocabulary words
 What are the 3 types of volcanoes?
 Describe how a volcano eruption
happens
 Please click here to complete your next
activity.