Volcanoes: Fire from Below — 4th Grade Reading Comprehension Worksheet

Deep beneath the surface of the Earth, temperatures are so hot that rock melts into a thick liquid called magma. Because magma is lighter than the solid rock around it, it slowly rises upward. In some places, it finds cracks or weak spots in the Earth's crust and pushes through, forming a mountain called a volcano. When magma reaches the surface, it is called lava.

Not all volcanoes erupt the same way. Some volcanoes ooze lava slowly, like Hawaii's Kilauea, creating rivers of glowing orange rock that flow downhill. Other volcanoes explode suddenly with tremendous force, shooting ash, rock, and gas high into the sky. Mount St. Helens in Washington State erupted this way in 1980, flattening forests for miles around and sending ash across several states.

Even though volcanoes can be dangerous, millions of people live near them. This is because volcanic soil is extremely rich in nutrients, which makes it excellent for growing crops. Countries like Indonesia and Italy have farms thriving on the slopes of active volcanoes. Scientists called volcanologists study volcanoes closely, watching for warning signs like small earthquakes and gas leaks so they can warn nearby towns before a dangerous eruption.

Volcanoes have shaped our planet for billions of years. They have created new islands, built mountain ranges, and even affected Earth's climate by releasing gases into the atmosphere. While they can cause destruction, volcanoes are also a powerful reminder that our planet is still changing beneath our feet.