Q: Is sand a naturally occurring granular material composed of finely divided rock and mineral particles? ¶
Q: Is sand calcium carbonate? ¶
A: Yes, for example aragonite, which has mostly been created, over the past half billion years, by various forms of life, like coral and shellfish.
Q: Is sand also used in children's play? ¶
Q: Is sand the principal component in common glass? ¶
Q: Is sand generally non-toxic? ¶
A: Yes, and sand-using activities such as sandblasting require precautions.
Q: Is sand commonly divided into five sub-categories based on size: very fine sand , fine sand , medium sand , coarse sand , and very coarse sand? ¶
A: Yes, These sizes are based on the Krumbein phi scale, where size in Φ = -log2D; D being the particle size in mm.
Q: Is sand a non renewable resource over human timescales? ¶
A: Yes, and sand suitable for making concrete is in high demand.
Q: Is sand mixed with masonry cement or Portland cement and lime to be used in masonry construction? ¶
Q: Is sand a $70 billion global industry? ¶
Q: Is sand typically rounded? ¶
Q: Is sand highly variable? ¶
A: Yes, and depending on the local rock sources and conditions.
Q: Is sand often a principal component of this critical construction material? ¶
Q: Is sand a favorite beach time activity? ¶
Q: Is sand to make sometimes intricate? ¶
A: Yes, and sometimes simple structures known as sand castles.