Volcanoes

​Volcanoes

Labelling

Label the parts of volcano

Drag labels to their correct position on the image

1. Crater

2. Lava

3. Volcano cone

4. Magma chamber

5. Vent

6. Dust, ash cloud

Volcano formation at divergent boundary- Mid Ocean Ridge formation

Midocean ridge

Thus the mid-ocean ridge is also known as a "spreading center" or a "divergent plate boundary." The plates spread apart at rates of 1 cm to 20 cm per year. As oceanic plates move apart, rock melts and wells up from tens of kilometers deep.

Volcano formation at convergent boundaries: At Subduction zone

Volcano formation at convergent boundaries:
At Subduction zone

​At a convergent plate boundary, one plate dives or “subducts” beneath the other, resulting in a variety of earthquakes and a line of volcanoes on the overriding plate.

The Mid-Ocean ridge

• Found underwater around 1952

• Older Crust is deposited into the Earth through a Trench.

• Then a New layer of Crust is made here.

Multiple Choice

A divergent boundary occurs where plates ....

• Pull apart

• Come together

• Slide past each other

• subducting

Multiple Choice

Where would the oldest rock be found?

• L
• M
• N
• O

Multiple Choice

The OLDEST seafloor is located

• closest to the mid-ocean ridge.

• farthest from the mid-ocean ridge.

• east of Hawaii

• west of California

Multiple Choice

Seafloor spreading...

• creates new oceanic crust

• destroys or recycles crust

• creates new continental crust

• creates old crust

Multiple Choice

Mid-ocean ridges can be found in

• the Atlantic and Pacific Oceans

• the Pacific and the Indian Oceans

• all of Earth's oceans

• only the Atlantic Ocean

Cinder

​Composite cones are tall, cone shaped volcanoes that produce explosive eruptions.

Shield volcanoes form very large, gently sloped volcanoes with a wide base.


Cinder cones are the smallest volcanic landform. They are formed from accumulation of many small fragments of ejected material.

Match

Match the following type of volcanoes

Composite

Cinder Cone

Shield

• Composite

• Cinder Cone

• Shield

Multiple Choice

Non explosive eruption is loud

• True

• False

Multiple Choice

Non explosive eruption produces hude amount of lava

• True

• False

Match

Match the following:

Explosive eruption

Non explosive eruption

Volcanic materials

• Explosive eruption

• Non explosive eruption

• Volcanic materials

Multiple Select

Tick all the materials released from a volcano during explosive eruption

• Ash

• Water

• Debris

• Gas

The Ring of Fire, also referred to as the

Circum-Pacific Belt, is a path along the

Pacific Ocean characterized by active

volcanoes and frequent earthquakes.

The majority of Earth's volcanoes and

earthquakes take place along the Ring of

Fire.

A hot spot is an area on Earth over

a mantle plume or an area under

the rocky outer layer of Earth,

called the crust, where magma is

hotter than surrounding magma.

The magma plume causes melting

and thinning of the rocky crust

and widespread volcanic activity.

Hot spots