The pencil is 150 years old

5. From the information in the text, what are the main differences between graphite and lead? (25-50 words)

As we can see in the text, lead was used in ancient Rome, when people wrote with styluses.
However, graphite was discovered later, in England in 1564.
The main differences between these materials are that graphite is darker and softer than lead.
Furthermore it is more breakable (it needed a holder).

6. Which do you think are the reasons for the popularity of pencils as writing instruments? (25-50 words)

From my point of view, pencils are so popular because they are light and you can take them everywhere. They can be used to writing or drawing, and there are many types of them.
In addition, you can delete what you write, because pencils usually include a rubber.
In conclusion, pencils are very practical materials.