sulfide
part of speech
noun (a sulfide, sulfides; UK spelling also sulphide)
meaning for a pupil
1) (science) A sulfide is a chemical compound made of sulfur joined with another element, often a metal, such as iron sulfide or hydrogen sulfide. tree →
2) Many sulfides are minerals and metal ores, such as pyrite (fool's gold), which is iron sulfide. tree →
sense in the lessons
In chemistry and science lessons sulfides appear when iron and sulfur are heated together to make iron sulfide (a compound, not a mixture: a magnet no longer separates them). Hydrogen sulfide is the gas that smells of rotten eggs, made by rotting things and volcanoes, and it is poisonous in large amounts. Phrases: "iron sulfide", "hydrogen sulfide", "sulfide ore".
examples
- When we heated iron and sulfur, we made iron sulfide. tree →
- Fool's gold is iron sulfide, not real gold. tree →
- Hydrogen sulfide smells of rotten eggs. tree →
- Copper is often mined from sulfide ores. tree →
- Black smokers on the sea floor pour out sulfides. tree →
- Iron sulfide is a compound, so a magnet cannot pull the iron out. tree →
- The bad smell near the swamp came from sulfides. tree →
note
US and international science spelling: sulfide, sulfur; traditional UK spelling: sulphide, sulphur; both are correct. Do not confuse with sulfate (sulfur plus oxygen and another element).
Trees and pragmatics
Every meaning and example of «sulfide» parsed by Mova, each sentence with its dependency tree and frames.