Final answer:
Prior to traversing on ice, you should assure yourself that the ice is thick and strong, typically at least three feet thick, but this can vary and should be checked locally for safety.
Step-by-step explanation:
As a precaution prior to traversing on ice, you should ensure that the ice is thick and stable enough to support your weight. Ice should generally be at least three feet thick to ensure safety when walking or driving on it. However, this can vary based on the conditions and should always be checked locally. It's important because ice is less dense than liquid water, and bodies of water freeze from the top down, creating a surface layer that insulates the water below. This also means that layers of ice and water can form, sometimes making it difficult to distinguish the stability of the surface without proper knowledge and experience.
Considering safety measures is crucial as the alternative layers of water and ice can create hazardous conditions. Additionally, understanding that the expansion of water when freezing is the reason that antifreeze is required for engines and why exposed pipes can break, indicates the powerful force that ice can exert. Therefore, extreme caution should be exercised around ice to prevent accidents and ensure safe passage.