What are 3 facts about volcanoes?
Top 10 Facts About Volcanoes
- Volcanoes are openings of the Earth’s surface.
- The word volcano comes from the word ‘vulcan’.
- Volcanoes can be active, dormant or extinct.
- The liquid inside the volcano is called magma.
- Lava is the liquid that is expelled from the volcano.
- Lava is very, very hot!
What are the top 3 volcanoes?
The top five biggest volcanic eruptions
- 5 – Mount Vesuvius. In Italy in AD 79, this volcano devastated the nearby cities of Pompeii and Herculaneum.
- 4 – Mount Ruiz.
- 3 – Mount Pelée.
- 2 – Mount Krakatoa.
- 1 – Mount Tambora.
- But the worst could still be to come…
What is a volcano 4th grade?
A volcano is a mountain or hill with an opening. When a volcano erupts, magma is pushed up through the opening with great force. When magma reaches the Earth’s surface, it is called lava. Lava can be as hot as 2,200°F (1,204°C). Some volcanic eruptions are explosive.
How hot is a volcano?
When a volcano erupts, the surroundings can get pretty warm. Basalt lava (the most common type) can reach temperatures of around 1200 degrees Celsius, while rocks scattered around the volcano can also reach temperatures of up to 1,000 degrees Celsius.
How fast do volcanoes grow?
How Long Does it Take a Volcano to Grow? Volcanoes are created over approximately 10,000-500,000 years by thousands of eruptions — each lava flow covering the one before it. In the case of oceanic island volcanoes, lava erupts first from fissures, or cracks, on the deep ocean floor.
How hot is lava from a volcano?
The temperature of lava flow is usually about 700° to 1,250° Celsius, which is 2,000° Fahrenheit. Deep inside the earth, usually at about 150 kilometers, the temperature is hot enough that some small part of the rocks begins to melt. Once that happens, the magma (molten rock) will rise toward the surface (it floats).
How old is the oldest volcano?
about 350,000 years old
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 are the 5 biggest volcanoes in the world?
Height of select volcanoes worldwide (in meters)
| Volcano, location | Height in meters |
|---|---|
| Mount Kilimanjaro (Tanzania)* | 5,895 |
| Popocatépetl Volcano (Mexico) | 5,426 |
| Mauna Loa (Hawaii, United States)* | 4,169 |
| Mount Fuji (Tokyo, Japan) | 3,776 |
What are the 3 types of volcanoes?
Individual volcanoes vary in the volcanic materials they produce, and this affects the size, shape, and structure of the volcano. There are three types of volcanoes: cinder cones (also called spatter cones), composite volcanoes (also called stratovolcanoes), and shield volcanoes.
How did volcano get its name?
The name volcano comes from Vulcan, the Roman god of fire! A volcano is formed when hot molten rock, ash and gases escape from an opening in the Earth’s surface.