What are 3 interesting facts about a volcano?
An erupting volcano can trigger tsunamis, flash floods, earthquakes, mudflows and rockfalls. More than 80% of the earth’s surface is volcanic in origin. The sea floor and some mountains were formed by countless volcanic eruptions. Gaseous emissions from volcano formed the earth’s atmosphere.
How many volcanoes are in the world?
There are about 1,350 potentially active volcanoes worldwide, aside from the continuous belts of volcanoes on the ocean floor at spreading centers like the Mid-Atlantic Ridge. About 500 of those 1,350 volcanoes have erupted in historical time.
What’s the oldest volcano?
Etna
The oldest volcano is probably Etna and that is about 350,000 years old. Most of the active volcanoes that we know about seem to be less than 100,000 years old. Volcanoes grow because lava or ash accumulates on the volcano, adding layers and height.
What is the most dangerous thing about volcanoes?
Probably the most dangerous thing is when a volcano produces what is called a pyroclastic flow. A pyroclastic flow is a cloud of hot gas and as, and can have a temperature of 1000 degrees C, and move as fast as 500 miles per hour.
What are the three most famous volcanoes?
Famous Volcanoes in the World 1. Mount St. Helens, United States 2. Krakatoa , Indonesia 3. Mount Vesuvius , Italy 4. Mount Etna , Italy 5. MAUNA LOA , Hawaii 6. Mount Fuji , Tokyo 7. Mount Pinatubo , Philippines 8. Mt. Pelee, Martinique 9. Mount Tambora , Indonesia 10. Mount Cotopaxi, South America
What are the positive things about volcanoes?
Volcanoes can provide people with many benefits such as: volcanic rock and ash provide fertile land which results in a higher crop yield for farmers tourists are attracted to the volcano, which increases money to the local economy geothermal energy can be harnessed, which provides free electricity for locals minerals are contained in lava, eg diamonds – this can be mined to make money
What are some things about volcanoes?
The lava and ash deposited can provide nutrients for soil making it very fertile. The high level of heat and activity inside the volcano can provide geothermal energy. Volcanoes can provide valuable materials such as Zinc, Copper, Gold and Crystals.