Magmas are...

Magmas are...

• A. Clear solutions with dissolved particles.
• B. Substances with gas bubbles.
• C. Particles suspended in a liquid, giving a pasty consistency; Milk of Magnesia is an example.
• D. Aerosols in vapor form.

Answer: (C)

Magmas are a suspension: a heterogeneous mixture where solid particles are dispersed in a liquid, giving a thick, pasty consistency rather than a clear solution. Milk of Magnesia is a classic example—a suspension of magnesium hydroxide in water. In contrast, a true solution dissolves completely and is typically clear, a mixture with gas bubbles describes a foam rather than a paste, and an aerosol involves particles dispersed in a gas, not a viscous paste.

Magmas are a suspension: a heterogeneous mixture where solid particles are dispersed in a liquid, giving a thick, pasty consistency rather than a clear solution. Milk of Magnesia is a classic example—a suspension of magnesium hydroxide in water. In contrast, a true solution dissolves completely and is typically clear, a mixture with gas bubbles describes a foam rather than a paste, and an aerosol involves particles dispersed in a gas, not a viscous paste.