Igneous rocks area)primary rocks.b)secondary rocks.c)tertiary rocks.d)soft rocks.Correct answer is option 'A'. Can you explain this answer?

Question

Answer

The igneous rocks (Ignis – in Latin means ‘Fire’) are formed when magma cools and solidifies. As igneous rocks form out of magma and lava from the interior of the earth, they are known as primary rocks.

Answer

When the molten magma cools, it becomes solid. Rocks thus formed are called igneous rocks. They are also called primary rocks.....the reason is these igneous rocks further leads to the formation of sedimentary and metamorphic rocks(under certain temperature and pressure conditions). So,  the answer is A.

Answer

Igneous rocks are known as primary rocks as they are formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.

I hope it will help you!!!

Answer

Primary Rocks: Igneous Rocks

Igneous rocks are classified as primary rocks. They are formed through the solidification and cooling of molten lava or magma. The word 'igneous' comes from the Latin word 'ignis,' which means fire. These rocks are primarily composed of silicate minerals and are one of the three main types of rocks, along with sedimentary and metamorphic rocks.

Formation of Igneous Rocks:
- Magma Formation: Igneous rocks form when molten lava or magma cools and solidifies. Magma is formed beneath the Earth's surface due to the melting of rocks under high temperatures and pressure.
- Cooling and Crystallization: As the magma rises towards the surface or is exposed to the air or water, it begins to cool down. The cooling process determines the texture and structure of the igneous rock. If the cooling is slow, larger crystals are formed, resulting in a coarse-grained texture. On the other hand, rapid cooling leads to the formation of small crystals or even glassy texture.

Types of Igneous Rocks:
1. Intrusive Igneous Rocks: These rocks form when magma solidifies beneath the Earth's surface. The slow cooling process allows for the growth of large crystals. Examples include granite, diorite, and gabbro.
2. Extrusive Igneous Rocks: These rocks form when lava solidifies on the Earth's surface. The rapid cooling process results in the formation of small crystals or glassy textures. Examples include basalt, andesite, and rhyolite.

Key Characteristics of Igneous Rocks:
- Hardness: Igneous rocks are generally hard and resistant to weathering and erosion.
- Mineral Composition: The mineral composition of igneous rocks depends on the elements present in the magma. Common minerals found in igneous rocks include quartz, feldspar, mica, and pyroxene.
- Color: Igneous rocks can have a variety of colors, ranging from light-colored rocks like granite to dark-colored rocks like basalt.
- Texture: The texture of igneous rocks can vary from coarse-grained to fine-grained, depending on the cooling process.

Importance of Igneous Rocks:
- Building Materials: Igneous rocks such as granite are widely used as building materials due to their durability and strength.
- Geological Significance: The study of igneous rocks provides valuable information about the Earth's history, volcanic activity, and the processes occurring within the Earth's interior.
- Mineral Resources: Igneous rocks are a significant source of valuable minerals such as gold, silver, copper, and platinum.

In conclusion, igneous rocks are classified as primary rocks. They are formed through the solidification and cooling of molten lava or magma. Igneous rocks have various types, characteristics, and important uses in different fields.

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