The Caries Process Begins When the PH Drops Below What

question 4

Multiple Choice

The caries process begins when the pH drops below what level?

• A)7
• B)6.5
• C)5.5
• D)5

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Definitions:

Volcanic Neck

A vertical column of volcanic rock, formed by magma solidifying in the vent of an inactive volcano.

Igneous Feature

A geological structure formed from hardened lava or magma, such as a volcano or granite intrusion.

Dike

A sheetlike intrusion that cuts across any layers in a host rock, commonly formed with a steep orientation.

Sill

A tabular igneous intrusion that parallels layers or other planar structures of the surrounding rock and which usually has a subhorizontal orientation.