Answer the questions at the end based on the text.

The Silurian is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago (Mya), to the beginning of the Devonian Period, Mya. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by several million years. The base of the Silurian is set at a major OrdovicianSilurian extinction events when 60% of marine species were wiped out.

A significant evolutionary milestone during the Silurian was the diversification of jawed and bony fish. Multi-cellular life also began to appear on land in the form of small, bryophyte-like and vascular plants that grew beside lakes, streams, and coastlines, and terrestrial arthropods are also first found on land during the Silurian. However, terrestrial life would not greatly diversify and affect the landscape until the Devonian.

The Silurian system was first identified by British geologist Roderick Murchison, who was examining fossil-bearing sedimentary rock strata in south Wales in the early 1830s. He named the sequences for a Celtic tribe of Wales, the Silures, inspired by his friend Adam Sedgwick, who had named the period of his study the Cambrian, from the Latin name for Wales. This naming does not indicate any correlation between the occurrence of the Silurian rocks and the land inhabited by the Silures. In 1835 the two men presented a joint paper, under the title "On the Silurian and Cambrian Systems, Exhibiting the Order in which the Older Sedimentary Strata Succeed each other in England and Wales," which was the germ of the modern geological time scale. As it was first identified, the "Silurian" series when traced farther afield quickly came to overlap Sedgwick's "Cambrian" sequence, however, provoking furious disagreements that ended the friendship. Charles Lapworth resolved the conflict by defining a new Ordovician system including the contested beds. An early alternative name for the Silurian was ""Gotlandian"" after the strata of the Baltic island of Gotland.

1. How long the Silurian period lasted?
2. When did it start?
3. When it ended?
4. What signifies the Silurian period?
5. What else?
6. Where?
7. like?
8. How about plants?
9. Was there lot of diversification?
10. Until when?
11. Who first came up with this period?
12. Who was he?
13. From which country?
14. When he was doing his research?
15. Where?
16. Did he name it after something?
17. After what?
18. What they were called?
19. Who inspired him in that?
20. What he discovered?

Numbered answers:
1. 24.6 million years
2. end of the Ordovician Period
3. beginning of the Devonian Period
4. diversification of jawed and bony fish
5. Multi-cellular life
6. on land
7. bryophyte
8. found on land
9. no
10. Devonian period
11. Roderick Murchison
12. geologist
13. Britain
14. 1830s
15. south Wales
16. yes
17. Celtic tribe of Wales
18. Silures
19. Adam Sedgwick
20. Cambrian sequence