The Discovery and Evolution of Graphite Usage

In 1564, a storm in Borrowdale, England, uncovered a black substance later identified as graphite. Initially thought to be a form of lead, it was called plumbago. Locals found it useful for marking but needed to encase it in wood due to its brittleness. The term 'plumbago' is linked to 'plumbum,' the Latin word for lead, explaining why plumbers are named after lead pipes. Ultimately, the substance was recognized as graphite, not lead.

What was the initial use of the black substance discovered in Borrowdale?

• As a fuel source

• As a food ingredient

• For building materials

• For making marks

What material was initially used to wrap the black substance for better handling?

• Metal

• Plastic

• String

• Leather

Why was the black substance initially called 'plumbago'?

• It was thought to be a type of coal

• It was believed to be a form of lead

• It resembled a precious stone

• It was named after a local town

What is the Latin word for lead, which also relates to the term 'plumber'?

• Argentum

• Ferrum

• Aurum

• Plumbum

What was the true identity of the substance found in Borrowdale?

• Lead

• Coal

• Graphite

• Charcoal