Lava is molten or partially molten rock that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or underwater, usually at

2023年8月6日 · Magma and lava are terms that people use interchangeably in everyday conversation, but they are different stages in the life cycle of molten rock. The main difference between magma and lava is that magma is molten rock beneath the Earth’s surface, while lava is molten rock on the surface.

Magma that is extruded onto the surface during a volcanic eruption is called lava. Lava cools and solidifies relatively quickly compared to underground bodies of magma. This fast cooling does not allow crystals to grow large, and a part of the melt does not crystallize at all, becoming glass.

lava是岩浆。也就是火山喷出来的那些东西。当magma到达地表的时候，也就变成了lava。当然在它上来的时候或多或少会发生一些物理化学的变化，但对于magma和lava的分别并不通过成分或温度区别，而仅仅看它在什么位置。

2025年3月22日 · lava, magma (molten rock) emerging as a liquid onto Earth’s surface. The term lava is also used for the solidified rock formed by the cooling of a molten lava flow. The temperatures of molten lava range from about 700 to 1,200 °C (1,300 to 2,200 °F).

Scientists use the term magma for molten rock that is underground and lava for molten rock that breaks through the Earth's surface.

According to Native Hawaiian tradition, molten lava is the manifestation of Pele— the volcanic deity and creator of new lands. She is a rejuvenating and creative force, reshaping the landscape with each eruption. Indeed, molten lava that reaches the surface during volcanic eruptions is still adding mass to the island of Hawaiʻi.

2021年10月11日 · Molten rock that has reached Earth’s surface is called lava. Depending on its chemical composition, lava can be runny like syrup or so thick it barely flows at all. This molten material is still called lava once it has cooled and hardened. The solid rock is known as igneous rock. The formation of igneous rock is part of Earth’s rock cycle.

At the heart of every volcanic eruption is lava, the molten rock that makes its dramatic entrance onto the earth’s surface, painting the landscape with its fiery brush. But lava isn’t just a spectacle; it’s a creator and transformer, playing a pivotal role …

2023年6月12日 · Lava is the form of magma, or molten or semi-molten rock, that erupts to the surface, such as via a volcano or through a crust fracture. We all know lava is pretty hot, but exactly how hot...