Final answer:
The unrelated term among irrigation, silt, and canal is b) silt, as it does not concern water supply methods. The other terms mentioned are defined as condensation, ion, hardness, and sulfur dioxide.
Step-by-step explanation:
The question involves distinguishing which vocabulary term out of three is unrelated to the others. In this case, we are given the terms a. irrigation, b. silt, and c. canal.
Both irrigation and canal relate to methods of supplying water, whereas silt is related to fine soil or sediment. Therefore, silt is the term that does not relate directly to the others concerning water management techniques.
1. The change in phase of water from a gas to a liquid is called condensation.
2. A charged atom is known as an ion.
3. A term used to describe the mineral content of water is hardness.
4. A gas that forms sulphuric acid when it reacts with water is sulfur dioxide (SO2).
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