(a) Magma that comes out of volcanoes
(b) A rock used to lay roads
(c) Natural solid materials like rocks which contain minerals
(d) A type of rock that forms when lava cools
(e) A thick, brown material formed by rotting plants under the Earth
(e) is used to make mirrors.
Answer in one word.
Answer (2)
The question involves various geological materials and processes including magma, road construction, mineral deposits, igneous rocks, and peat. Each item highlights a crucial aspect of geology and natural resources. Understanding these concepts is important for recognizing how the Earth's materials are utilized in various applications.
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The question is asking for one word that answers each of the descriptions provided:
(a) Magma that comes out of volcanoes is called "lava."
(b) A rock used to lay roads is often "asphalt" or "gravel."
(c) Natural solid materials like rocks which contain minerals are referred to as "ores."
(d) A type of rock that forms when lava cools is known as "igneous."
(e) A thick, brown material formed by rotting plants under the Earth that is used to make mirrors is "silica," which is derived from sandstone, a sedimentary rock rich in this mineral.
Let's break this down further:
Lava : This is the hot molten or semi-fluid rock that erupts from a volcano. Once it reaches the earth's surface, it's called lava. When it cools, it forms solid rock.
Asphalt/Gravel : These are materials used in road construction. Asphalt is a sticky, black, and highly viscous liquid or semi-solid form of petroleum, while gravel consists of small stones and pebbles.
Ores : These are naturally occurring rocks from which metals or minerals can be extracted profitably. Examples include iron ore and bauxite.
Igneous : This type of rock forms when molten lava cools and solidifies. Common igneous rocks include basalt and granite.
Silica : Often found in sand, silica is a primary component of glass and mirrors. It is derived from quartz, which is found in sandstone. The decomposition and compaction of plant matter can sometimes be associated with fossil fuels like peat, but in the context of mirrors, silica is the key material needed.
