2. Table salt. This is the most common kind of salt, and the one most used in the our kitchen. Sourced from salt mines, it is then refined and most minerals removed. Anti-caking agents are added to prevent clumping, as is iodine, a nutrient not always naturally present in salt.
Opaque is from a Latin word meaning dark, and that was its original sense in English, but it now means literally not transparent or metaphorically hard to understand; unclear: Some of his sentences are really opaque..
(Teacher shows the power point information.). Opaque materials do not let any light pass through. You can't see through an opaque material. It either reflects or absorbs the light rays that strike it. Wood is an opaque material.