Here's why:
* Clay's plasticity: Clay's most valuable property for pottery is its plasticity, meaning it can be molded and shaped without cracking. This is due to the fine-grained, layered structure of clay minerals.
* Clay's ability to harden: When clay is heated, it undergoes a process called vitrification. This involves the water in the clay being driven off and the minerals fusing together to form a hard, durable material.
* Clay's thermal conductivity: While clay can hold heat, it's not the best material for holding hot water due to its relatively high thermal conductivity. This means it readily transfers heat, making it less effective at keeping things hot.
A geologist might say something like:
"While clay can hold heat, that's not the primary reason it's a great material for pottery. Its ability to be molded and shaped, along with its ability to harden when fired, make it ideal for creating durable and functional pottery."
