🔍 Key Concepts

• Properties of Liquefied Petroleum Gas (LPG) • Why odorants/other additives are used in otherwise hard-to-detect gases • Which physical properties (color, pressure, density, odor) are most useful for leak detection and safety

💭 Think About

• If LPG escapes into the air, which changed property would help people quickly notice a leak without instruments? • Think about which of the four options can be easily sensed by humans under normal conditions around the home or on a ship. • Consider how natural gas and LPG are normally made safer for use in homes, galley areas, and engine rooms.

✅ Before You Answer

• Which property of LPG is naturally very hard for humans to detect without any additive? • Which one of the four options is typically changed by adding a small amount of another substance rather than changing the LPG itself? • Ask yourself: for gas leaks, what do safety briefings and warning labels usually tell you to pay attention to?