In seawater, solid particles formed from chemical reactions are called?

• A. Chemical Precipitates
• B. Sedimentary Rocks
• C. Organic Matter
• D. Microplastics

Answer: (A)

Solid particles formed from chemical reactions in seawater are called chemical precipitates. When dissolved ions in seawater react to form an insoluble compound, that compound separates from the solution as a solid—a precipitate. This is different from sedimentary rocks, which form from the accumulation and lithification of sediments over long times; organic matter, which comes from biological material; and microplastics, which are tiny plastic pieces from human-made polymers. The key idea is the solid arises directly from a chemical reaction producing an insoluble product, so chemical precipitates is the best fit.