One example of a cinder cone volcano is Sunset Crater, in Arizona. Volcanoes have played an important role in shaping our Earth. Ash from volcanoes adds helpful minerals to soil. This helps plants grow strong. Healthy plants produce oxygen for humans and animals to breathe. This helps keep our planet cool. In recent years, a new benefit of volcanoes has surfaced. Scientists are turning to volcanoes to help power cities. Researchers are exploring geothermal energy. Volcanoes may be unpredictable.
But as we learn more about how they work, they will become even more important to life on Earth. Stargazers in ancient Greece noticed something extraordinary in the night sky. They observed that a few bright objects moved among the constellations. But our understanding of these…. In the years leading up to the Civil War, Frederick Douglass February —February 20, was the most powerful speaker and writer of the abolitionist movement.
Frederick Douglass was born into slavery in Talbot County, Maryland. He was raised by…. Fannie Lou Hamer October 6, —March 14, was a civil rights activist. She fought to expand voting rights for African Americans. African Americans in the…. Martin Luther King Jr. His leadership helped end segregation during the civil rights movement.
For example, if you try to blow bubbles in cooking oil though a straw, the bubbles can escape quite easily because the cooking oil is runny. It is the same with volcanoes. When magma rises towards the surface gas bubbles start to form.
Whether or not they can escape as the magma is rising affects how explosive the eruption will be. Lava is what we call magma when it reaches the surface. However, where the magma is very sticky, like jam or peanut butter, and if it contains a lot of bubbly gas then the gas can get stuck and eruptions can be very powerful and explosive, like the recent eruptions at Fuego volcano in Guatemala.
In explosive eruptions the frothy, bubbly magma can be ripped apart into tiny bits called volcanic ash. This is not ash like you get after a barbecue or fire, it does not crumble away in your fingers. It is very sharp and is dangerous to breathe in. While you wait for it to be checked and approved why not to add a pre-selected message and a cool badge.
Very interesting. I didn't know some birds lay their eggs near the base of a volcanoe to keep them warm. See all. Check out some fascinating facts about volcanoes! Volcano facts.
Love animals? How are volcanoes formed? Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface. At the surface, it erupts to form lava flows and ash deposits. Over time as the volcano continues to erupt, it will get bigger and bigger. What are the different stages of volcanoes? Scientists have categorized volcanoes into three main categories: active, dormant, and extinct. An active volcano is one which has recently erupted and there is a possibility that it may erupt soon.
A dormant volcano is one which has not erupted in a long time but there is a possibility it can erupt in the future. Why do volcanoes erupt?
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