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5 10Is Mt. Hood

active and in danger?

Past violent

eruptions

Lahars on Mt. Hood

Mt. Hood Today

Examples of Mts.

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Team OneTeam One

Team TwoTeam Two

Team ThreeTeam Three

Team FourTeam Four

Team FiveTeam Five

Team SixTeam Six

Topic 1

How far away is Portland from the

summit of Mount Hood?

Show Answer

Topic 1

We are 50 miles away from the summit of

Mount Hood.

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Topic 1

Mt. Hood has a history of what kind of

eruption? Gentle or violent??

Show Answer

Topic 1

Mt. Hood has a history of gentle eruptions.

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Topic 1

How far can lava flows travel from the crater?

Show Answer

Topic 1

Lava flows can travel between 6 to 8 miles

from the crater.

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Topic 1

What kind of mountain is Mt. Hood? A cinder, composite, or shield?

Show Answer

Topic 1

Mt. Hood is a composite cone.

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Topic 1

How do we know that Mt. Hood is active? Also what is the name when there is rising steam?

Show Answer

Topic 1

We know that Mt. Hood is active by the smell of sulfur that is also associated with

volcanoes and the rising steam called fumaroles.

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Topic 2

When did the north flank and summit

collapse?

Show Answer

Topic 2

The north flank and summit collapsed about

100,000 years ago.

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Topic 2

What side is Timberline Lodge on?

Show Answer

Topic 2

Timberline Lodge is on the south side of the

mountain.

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Topic 2

In the 100,00 year ago eruptions what huge lahar swept down the Sandy or Hood River?

Show Answer

Topic 2

The huge lahar swept down the Hood River.

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Topic 2

How thick was the debris from the

100,000 year ago eruption? What is it

equivalent to?

Show Answer

Topic 2

The debris was 40 feet thick and it is

equivalent to a 4 story building.

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Topic 2

Since the lahar was so big what did it do to the Columbia River?

Show Answer

Topic 2

The lahar pushed the Columbia river

northward.

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Topic 3

If lava doesn’t flow down the mountain side it will build up

around the vent and create a what?

Show Answer

Topic 3

It will create a lava dome that is hundreds

of feet tall.

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Topic 3

What is the reason to the precious question?

Show Answer

Topic 3

Because the lava is thick.

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Topic 3

What is the name of the lava dome we see from the Timberline

Lodge side?

Show Answer

Topic 3

The lava dome on the Timberline Lodge side is called Crater Rock.

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Topic 3

How many years ago was Crater Rock

formed?

Show Answer

Topic 3

Formed 200 years ago.

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Topic 3

When these lava domes collapse, eruptions

occur that release hot gases and ash called?

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Topic 3

Called a pyroclastic flow.

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Topic 4

Where are the fumeroles on Mt. Hood?

Show Answer

Topic 4

Fumeroles are near Crater Rock.

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Topic 4

If Mt. Hood experiences an eruption today it would

mostly be similar to what year?

Show Answer

Topic 4

It would be similar to the 200 year ago eruption.

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Topic 4

If Hood does become more active, it will be

in what form?

Show Answer

Topic 4

It would be in the form of lava dome build up.

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Topic 4

What do pyroclastic flows do?

Show Answer

Topic 4

Pyroclastic flows will melt glaciers and produce lahars.

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Topic 4

How many earthquake swarms does Hood

experience?

Show Answer

Topic 4

Experiences between 1 to 3 a year.

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Topic 5

What kind of cone is Mauna Loa and why?

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Topic 5

Mauna Loa is shield cone because it is

made up of thin lave

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Topic 5

What is the best description of a shield

volcano?

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Topic 5

Best description is broad and flat.

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Topic 5

What is an example of a cinder cone?

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Topic 5

Example would be Paracutin.

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Topic 5

Vesuvius is a example of what kind of cone?

Show Answer

Topic 5

Example of a composite cone.

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Topic 5

What is the most common volcano in the

Cascade Range?

Show Answer

Topic 5

Most common is composite cones.

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Show Question

“Big Points”

What are positive aspects of volcanoes?

List all of them.

Show Answer

302928272625242322212019181716151413121110987654321

Big Points1. Sulfur in rubber

2. Abrasive

3. Construction materials

4. New land

5. Brings carbon dioxide up from the ocean floor

6. Preserves history

7. Rich soil

8. Gold and diamonds

9. Sulfur in explosives

10. Sulfur based drugsBack to Board

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