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# 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 →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/M/magma/#m1)

### 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 →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/M/magma/#x1)
- When magma reaches the surface, it is called lava. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/M/magma/#x2)
- Granite forms from cooled magma. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/M/magma/#x3)
- A volcano erupts when magma pushes up. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/M/magma/#x4)
- The magma chamber is under the volcano. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/M/magma/#x5)
- Magma is hotter than an oven. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/M/magma/#x6)

### 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.](https://md.mova.elamur.ai/free/en/corpora/school/geography/42-plate-tectonics/8/)
- [Underground the melted rock is called magma; once it pours out on the surface it is called lava.](https://md.mova.elamur.ai/free/en/corpora/school/geography/46-volcanoes-how-and-where/1/)
- [Melted rock is called magma while it is underground and lava once it pours out on the surface.](https://md.mova.elamur.ai/free/en/corpora/school/geography/46-volcanoes-how-and-where/6/)
- [When a huge eruption empties the magma chamber, the ground above can collapse into a giant crater called a caldera.](https://md.mova.elamur.ai/free/en/corpora/school/geography/46-volcanoes-how-and-where/16/)
- [Melted rock is called magma under the ground and lava when it comes out on the surface.](https://md.mova.elamur.ai/free/en/corpora/school/world/43-landforms/10/)

### Trees and pragmatics

[Every meaning and example of «magma» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/M/magma/), each sentence with its dependency tree and frames.