Volcano Explorer Web-quest Name ____________________

Go to website- kids.discovery.com

Scroll down to the 4th section labelled “Explore”

Select the circle labelled “Earth”. Then select the picture below.

Next click on the “Enter” button

Select “Volcano Types” from left side Menu

There are three types of volcano’s list in the lower right corner. Find the following information for each.

Stratovolcano -

1. Characteristics

a. Built from layer 1)_________ 2)___________ of mostly Viscous

3)_______________.

b. Have relatively 4)_____________ 5)_________ and can grow to

Great 6)_______________.

c. Have potential for 7)__________________ 8)_________________.

2. Examples of Stratovolcano’s

a. Italy’s 9) __________ _________ destroyed Pompeii in 10)____A.D.

b. 11)____________ ______________ in the United States.

Cinder cone- select this type from lower right corner.

1. Characteristics

a. Relatively 12)__________

b. Less than 13)_____________ ft.

c. Very 14)___________ sides.

d. 15)__________________ shape.

e. Built from piles of ejected 16) _________ 17)___________.

f. Lava usually flows from a breech in the 18)______________ or

19)_________________ of the volcano.

2. Examples

a. Italy’s 20)_______________________

b. New Mexico’s 21)_____________________

Shield Volcano- select this type from lower right.

1. Characteristics- a. 22)________________ structures with 23)____________ gently

24)___________ sides.

b. Usually built up from the 25) ___________ ____________.

c. They are the 26) ____________ volcanos on Earth.

d. Built from layers of fluid runny 27)_____________ that can

28)___________ long distances before cooling. Continue next page

2. Example

a. 29) ___________ __________ the largest of the Hawaiian volcanos.

It is about 30)_________ miles long and 31) ________ miles wide.

Select “Inside a Volcano” from left and fill in the blanks for the diagram

below.

Select “Global Perspective” from left menu. Then click “Ring of Fire”

form lower right corner. Answer questions below.

1. What is the Ring of Fire? 37) __________________________________

___________________________________________________________

2. What is the name of the Island in the center of the Ring of Fire?

38) __________________________

32)

35)34)

36)

33)

**Next select the “Build your own volcano and watch it erupt” from left side

menu.

**Select “viscosity info” from the bottom of page and fill in blanks below from

the pop up window. Close window when done.

The magma’s viscosity or 39)________________ is usually an indicator of the

amount of 40) _______________ it contains. Thick lava’s have

41)______________ levels of Silica and runny lava’s have 42)______________

levels of Silica.

**Select “gas info” from the bottom of page and fill in the blanks.

The amount of gas content within the lava flow usually depends on the amount of

43)___________ (__________) and 44)_________________________ dissolved

within the flow. These gases create 45) _______________ as the magma

46)____________, which provide eruptions with a 47)________________

48)___________________. Close the window you are done with gas info

**Now you are going adjust the gas and viscosity conditions and record some

information about the eruptions that take place. Have fun blowing up some

volcanos!!

First eruption___________________________________________________

Slide gas arrow to low setting (lower left of screen). Slide the viscosity to low

setting as well. Click the set conditions button below the controls.

What type of volcanos do these settings produce? 49) _____________________

An example of this type is 50) ______________________________________

Select the start eruption button.

What type of eruption was this? 51) ________________or (_________________)

Click on the two arrows that appear during eruption and describe what each one is.

1. 52) Lava tubes - _______________________________________________

_____________________________________________________________

2. 53) Lava flows- ________________________________________________

_____________________________________________________________

Second Eruption ___________________________________________________

Select “change settings” from lower left corner.

Slide the viscosity to high. Slide the gas to low.

What type of volcano does this form? 54)__________________________

Where do these types of volcanos usually form? 55) ________________________

__________________________________________________________________

Select “Start Eruption” button and answer questions below.

What type of eruption did this create? 56) ____________________________

The lava squeezed out of the Earth like 57)_________________ from a tube.

Click on the two arrows that appeared during the eruption and describe what each

one is.

1.Dome – Often form on the 58) __________ or 59) ____________ of a

stratovolcano or in the 60)______________ of a 61)______________ volcano.

2. Pyroclastic flow- A mass of very 62) ____________ gases and

63)____________ fragments. They rush down the 64) ________________ of a

volcano at more than 65) ________miles per hour. Everything in its path is

66) ______________________.

Third Eruption_____________________________________________________

Select “change settings”. Change the viscosity to low and gas to high. Select set

conditions and answer questions below.

What type of volcano did this create? 67)_________________________________

Where can you find volcanos of this type? 68)_____________________________

Select “Start Eruption” and answer the question below.

What type of eruption did this produce? 69)______________or (______________)

** There were two new words with arrows that appeared during eruption. Click on

the arrows and describe each.

1. Debris- They are small 70) ___________ blobs that form in the air from

71)_________ spray and fall downwind of the vent .

2. Fire Fountain – These sprays of lava can rise 72) ______________ of feet

and last for 73) _______________.

Fourth Eruption____________________________________________________

Select “change settings”. Adjust the viscosity to high and the gas to high.

Select “set conditions”. Answer questions below.

What type of volcano did this create?74) _________________________________

What are the two examples of this volcano? 75) 1. _________________ in

Washington State 76) 2. _______________ in Italy

Select “Start Eruption” and answer question below.

What type of Eruption was created? 77) __________________________________

This is the most 78) _____________________ type of release. These explosions

may be heard 79) _____________ of miles away.

** There are four new words with arrows from this explosion. Select each one and

describe.

1. Lahar- These are dangerous slides of 80) ____________ and 81) ________

triggered by rain and melting snow.

2. Plume- This is a giant plume of ash that reaches 82) ___________ to

83)_____________ miles above sea level. The ash will spread around the

Earth, falling over 84) _________________ of square miles.

3. Landslide- This is a massive landslide of 85)_____________ and

86) _____________.

4. Ash- The eruption releases clouds of ash. Towns downwind may be

completely covered in a layer of 87)_________________ and

88)_________________.

Once done you can play with settings and create your own eruptions!!