magma

«magma» in Mova's school dictionary: very hot melted rock under the Earth's surface — its meaning for a pupil, its sense in the lessons and examples, with 5 sentences of Mova's corpora that use it.

part of speech

noun (magma)

meaning for a pupil

Magma is very hot melted rock under the Earth's surface. tree →

sense in the lessons

In science and geography lessons pupils learn that magma comes from deep inside the Earth; when it comes out of a volcano it is called lava. When magma cools slowly underground it forms rocks like granite; when lava cools quickly above ground it forms rocks like basalt. These are igneous rocks. Phrases: magma chamber, hot magma, molten rock.

examples

• Magma is melted rock under the ground. tree →
• When magma reaches the surface, it is called lava. tree →
• Granite forms from cooled magma. tree →
• A volcano erupts when magma pushes up. tree →
• The magma chamber is under the volcano. tree →
• Magma is hotter than an oven. tree →

note

Uncountable noun. Magma vs lava: same melted rock — magma underground, lava above ground. Rocks made from magma or lava are igneous rocks. The plural «magmas» is used only by scientists.

In the corpora

• Where plates move apart, magma rises to fill the gap and makes new crust, as along the Mid-Atlantic Ridge.
• Underground the melted rock is called magma; once it pours out on the surface it is called lava.
• Melted rock is called magma while it is underground and lava once it pours out on the surface.
• When a huge eruption empties the magma chamber, the ground above can collapse into a giant crater called a caldera.
• Melted rock is called magma under the ground and lava when it comes out on the surface.

Trees and pragmatics

Every meaning and example of «magma» parsed by Mova, each sentence with its dependency tree and frames.