Which rocks are formed from molten rock?

Which rocks are formed from molten rock?

• A. Sedimentary rocks
• B. Metamorphic rocks
• C. Igneous rocks
• D. Mineral rocks

Answer: (C)

Rocks formed from molten rock are called igneous rocks. This type comes from magma that cools and solidifies underground, or lava that erupts onto the surface and then cools. The speed of cooling shapes the texture: slow cooling underground yields larger crystals (like granite), while rapid cooling at the surface produces very small crystals or a glassy texture (like obsidian). Sedimentary rocks form from sediments—pieces of other rocks, minerals, and organic material—that are weathered, transported, deposited, and cemented together. Metamorphic rocks come from existing rocks that are transformed by heat and pressure deep inside Earth, without melting. The term mineral rocks isn’t a standard classification for rocks; rocks are classified by how they form, not just by their mineral components.

Rocks formed from molten rock are called igneous rocks. This type comes from magma that cools and solidifies underground, or lava that erupts onto the surface and then cools. The speed of cooling shapes the texture: slow cooling underground yields larger crystals (like granite), while rapid cooling at the surface produces very small crystals or a glassy texture (like obsidian).

Sedimentary rocks form from sediments—pieces of other rocks, minerals, and organic material—that are weathered, transported, deposited, and cemented together. Metamorphic rocks come from existing rocks that are transformed by heat and pressure deep inside Earth, without melting. The term mineral rocks isn’t a standard classification for rocks; rocks are classified by how they form, not just by their mineral components.