Which risk increases when a Roman aqueduct experiences prolonged freezing temperatures during winter?

💡 Explanation

When freezing temperatures occur, water expands as it turns to ice because of hydrogen bonding, exerting pressure on the aqueduct structure leading to cracking. Therefore structural cracking results, rather than calcification, bacterial growth, or sediment deposition which require different chemical or biological processes.

• Which navigational error increased significantly off the Scilly Isles during the 18th century before widespread use of chronometers?
• Which benefit did Mesoamerican chinampa agriculture provide specifically for sustainable maize cultivation?
• Which outcome was accelerated during the Bronze Age in Mesopotamia when dissimilar bronze alloys contacted in moist soil?
• Which environmental risk increased when pre-Columbian societies intensified terrace farming in the Andes?
• What risk increased in ancient Inca terrace farming when irrigation canal sedimentation obstructed water flow?
• Which primary effect resulted from the invention of the printing press using movable type in the 15th century?