Say hello to Evi

Evi is our best selling mobile app that can answer questions about books, music, films, conversions, history, people, places and much more.

To experience the full power of Evi you can download her app for free on iOS, Android and Kindle Fire.

You asked:

is pencil a pure substance

No. Pencil is not a pure substance.

pencil (a thin cylindrical pointed writing implement; a rod of marking substance encased in wood)