list 3 ways that volcanoes can be harmful. Tell how volcanoes eruptions can also be helpful?

Question

homework help

Answer 1

All about volcanoes on this website:

http://en.wikipedia.org/wiki/Volcanoes

Answer 2

How does it effect the climate? It has been stated in many pieces of literature that you can say a volcano brings a black plague on society, when it erupts.

Volcanoes can be extremely harmful when they erupt. Richard Strothers a climatoligist has linked many volcanic eruptions to the bubonic plague, or the Black Death in the last 2,000 years.The most powerful volcanic eruptions can toss many of sulfur dioxide gas high into the atmosphere. In turn the gas mixes with water vapors and it will create sulfuric acid. This will begin to spread. As it spreads across the atmosphere, it will block the suns radiation, that will effect the jet stream and it will send it south. When the jet stream goes south it also takes some cold air from the north pole and it causes climates like Europe and the Middle East to be chilly and humid. This is what brings on the growth of rodents. Rodents are carriers of fleas that carry pestis, which is the bacteria that causes bubonic plague.

As for the world- affects of volcanic eruptions, this only happens when there are large explosive eruptions that throw material into the stratosphere. If it only gets into the troposphere it gets flushed out by rain. The effects on the climate have not been figured out. It depend on the size of the particles, if they are big then they let sunlight in, but it does not let heat radiated from the Earth's surface out.

If the particles are smaller, then they block some of the incoming energy from the Sun and the Earth cools off a little. There are all kinds of effects on the wind circulation and where storms occur, and just about anything else you can think of.

Some folks think that large eruptions can cause the weather phenomena called "El Nino" to start.

Large-scale volcanic activity may last only a few days, but the massive outpouring of gases and ash can change climate patterns for years. The reason it will change, is because of the stratosphere. The loose particles can linger up to four or more years.

How do volcanoes effect people? Volcanoes effect people in good and bad ways.The bad way volcanoes effect people is by homes, farmland,buildings,and roads being destroyed. It even causes death.





aPros and Cons: Although volcanoes are known for their violent eruptions and hot lava, believe it or not they have benefits for society. For example, a volcano helps enrihc soil for farming, and in the same respect it can destroy the crops as well. The vol canoe provides a reservoir to store groundwater. The earth's most valuable resources are found in volcanoes, those resources being sulfur ,zinc,copper,lead, and uranium just to name a few. The Lava is also helpful, because even though it may harm alto of the species it will also restore artifacts and fossils that geologist and scientist can learn from.

Volcanoes bring alto of jobs to a place, because you have tourist and scientist who travel all over the world to get a visual of what a volcano looks like.

People also live close to volcanoes because, geothermal energy can be harnessed by using the steam from underground which has been heated by the Earth's magma.

Answer 3

Hey, I'll be happy to help.

A volcano eruption causes smoke, and smoke is very bad for the human lungs, so that's one way.

The lava pouring out can destroy some buildings or wildlife, so that's a second one.

Now, you try to think of a third one. Come on, I know you can do it!

Also, when a volcano erupts, it emits lava. When lava hardens, it becomes very stable. Most islands, like Hawaii, are formed on top of vocanoes. vocanoes can make entire islands, which would be helpful.

Well, thats all I know, and good luck on your homework!

Answer 4

sounds like you're trying to cheat on a test. One way is the ash fall out. It smothers people who breathe it.2..Lava wipes out whole towns and kills anyone who comes in contact with it. 3...Blast from eruption can cause rocks falling on you.. HELPFUL...1 Lava is good for plant growth after it hardens.2...Ocean volcanoes create new land. 3.. Volcanic vents in ocean floor purifies and puts oxygen into the sea water.... hope this helps

Answer 5

1 - makes a good place for plants to grow
2 - can clear out any land and bring new animals and plants to life in the area
3 - form an island

Answer 6

There's the very dangerous shifting of objects and land that occurs along with it, the magma itself, and the gases [I think].

Eruptions can be helpful because they deposit minerals.

Answer 7

poisonous gas emissions...
destruction of property...
loss of life in immediate area...

can counteract global "warming" by blowing ash and dust high into the atmosphere which encircles the globe and blocks the sun.