The central idea of the article is that rocks are fundamental components of the Earth's structure and can be categorized into three different types based on their formation processes. The article explains that rocks can be made of various minerals, crystals, or even the remnants of living organisms, indicating their diverse origins. Additionally, it highlights the role of the theory of plate tectonics in the recycling of rocks, demonstrating how they can change types over time as they undergo different geological processes.
Rocks are all around us. They make up the backbones of hills and mountains and the foundations of plains and valleys. Beneath the soil you walk on and the deep layers of soft mud that cover the ocean basins is a basement of hard rock.
Rocks are made up mostly of different minerals or crystals. Some rocks are made of the shells of once-living animals, or of compressed plant matter.
Rocks are divided into three basic types, igneous, sedimentary and metamorphic, depending upon how they were formed. The theory of plate tectonics describes how rocks are recycled and change types over time. Write a short paragraph that explains the central idea of the article. Use at least two details from the article to support your response.
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