Question

Explain 10 parts of the teeth

Answer 1

Crown— the top part of the tooth, and the only part you can normally see. The shape of the crown determines the tooth's function.

Gumline— where the tooth and the gums meet.

Root— the part of the tooth that is embedded in bone.

Enamel— the outermost layer of the tooth. Enamel is the hardest, most mineralized tissue in the body — yet it can be damaged by decay if teeth are not cared for properly.

Dentin— the layer of the tooth under the enamel. If decay is able to progress its way through the enamel, it next attacks the dentin — where millions of tiny tubes lead directly to the dental pulp.

Pulp— the soft tissue found in the center of all teeth, where the nerve tissue and blood vessels are. If tooth decay reaches the pulp, you usually feel pain.

I dont think there are 10 parts of teeth? these are all i could remember

Answer 2

-Sodium is a very reactive metal. It is kept in kerosene to prevent it from coming in contact with oxygen and moisture. If this happens, it will react with the moisture present in air and form sodium hydroxide which is a highly exothermic reaction.