3. before you get ready to go diving, you want to explore the area. you see a small snowpack across a small bridge, a short walk away. as you approach the bridge, you notice interlocking metal joints that join the bridge to the road. what are these joints called? what purpose do they serve? (4 points)

The correct answer is known as the "Expansion Joint".

An Expansion joint or also referred to as the movement joint, it is an assembly made to safely absorb the temperature-induced expansion between two structures and the contraction of the construction materials used for the structure. The joints also absorbs vibrations, and to hold parts together even though stressors are present, stressors can be known characterized as the strong winds, seismic activities and temperature changes in the area.