Final answer:
The hard noncellular substance that covers the crown of a tooth is enamel. Enamel is the hardest material in the body and provides protection for the underlying dentin and pulp cavity.
Step-by-step explanation:
The hard noncellular substance that covers the crown of a tooth is enamel. Enamel is the hardest material in the body and provides protection for the underlying dentin and pulp cavity. Dentin is a bone-like tissue that surrounds the pulp cavity, while cementum covers the root of the tooth. The soft tissues surrounding the teeth and bones are called gums or gingiva.