Here's why:
* Suspension: A suspension is a heterogeneous mixture where solid particles are dispersed throughout a gas. The solid particles are typically larger than those found in a colloid, and they will settle out over time.
Examples of suspensions of solids in gases:
* Smoke: Solid particles of soot or ash suspended in air.
* Dust: Fine solid particles suspended in air.
* Aerosols: Many sprays, like hairspray or insecticide, are suspensions of solid particles in a gas propellant.
Key characteristics of suspensions:
* Heterogeneous: The mixture has distinct parts that are visible.
* Particles settle: Solid particles in a suspension will settle out over time due to gravity.
* Can be filtered: The solid particles can be separated from the gas by filtration.
Let me know if you'd like more examples or have other questions!
