In what type of environment would you expect to find substances with a specific gravity less than one?

• A. Floating on water
• B. Settling down in soil
• C. Evaporating quickly
• D. Sinking to the bottom of a container

Answer: (A)

Substances with a specific gravity of less than one are less dense than water, which enables them to float. When placed in water, such substances will remain on the surface rather than sinking, as their density is lower compared to that of water. This principle can be observed in various materials, such as oils or certain types of plastics, which naturally tend to float due to their low specific gravity. This characteristic is crucial in many applications, including environmental monitoring and cleanup, where understanding the behavior of hazardous materials in water is essential.

In contrast, settling down in soil, evaporating quickly, or sinking to the bottom of a container would involve materials with different specific gravities and densities, making those contexts inappropriate for substances with a specific gravity less than one.