What Is Chalk?
Chalk is a soft, white limestone. The chemical composition is calcium carbonate with minor amounts of silt and clay. It was formed from the shells that belonged mostly...
Read MoreChalk is a soft, white limestone. The chemical composition is calcium carbonate with minor amounts of silt and clay. It was formed from the shells that belonged mostly...
Read MoreHere’s one of the Bizarre incident happened to me which i am sharing with you. My School’s superintendent looked rather downcast as he read a note. “A...
Read MoreThis incident occurred when I was studying in fourth class. One day my cousin came to meet me during the school hours. It was our history period and since our teacher...
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