Answer: a tool to help find the periodicals that contain articles on a particular subject.
A periodical index is a tool that contains the subject, author and keywords of a particular list of periodicals. This tool helps you find articles about specific topics. The way to look through an index is similar to that of looking for items in a library catalog.
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Answer:
Because Calcites are fluorescent and glow with an array of vibrant colors under ultraviolet light but will not glow under a desk lamp.
Explanation:
Calcites are flourescent minerals.
Flourescence occurs when UV light reacts with chemicals in a mineral and makes it glow
