Final answer:
Yes, canning jars can explode due to cold temperatures when there is a pressure difference between the inside and outside of the jar.
Step-by-step explanation:
Yes, canning jars can explode due to cold temperatures. When a canning jar is exposed to cold temperatures, the air inside the jar contracts, creating a vacuum. If the jar is sealed tightly and the vacuum created is strong enough, the pressure inside the jar can become lower than the pressure outside.
This pressure difference can cause the jar to explode. It is important to follow proper canning procedures to prevent this from happening.