A vent at the earth's surface through which magma and gases erupt?

Answer 1

Magma becomes known as lava when it reaches the surface. And when the lava cools it usually forms some type of igneous rock, depending on the chemical composition of the lava.

The gases have no common name that I know of. But for the most part they are common gases which include but are not limited to steam, CO2, and traces of sulfur gases.

Answer 2

A volcano is a vent on the Earth's surface through which magma, gases, and ash erupt. Volcanic eruptions can range from effusive, where lava flows steadily, to explosive, where ash, gas, and rocks are ejected violently. Volcanoes can form on both land and undersea.

Answer 3

A volcano is in fact a mountain that opens downward into the Earth's surface into a chamber of magma. Magma and gases can erupt from the volcano. When magma reaches outside of the volcano, it is called lava.

Answer 4

When magma is released into the ocean, it begins to cool right away and form hard rock. This cooled magma creates a new ocean floor.

Answer 5

A volcano is formed when lava comes from a hole at the top of a mountain.