Misc: In 1844 ---------- King of Ethiopia (1896-1913), born. ?

Questions

What is the name for the hole in the side of a volcanoe that gives off volcanic gases?

Which metal comes from the ore cinnabar?

What does the term pizzicato mean?

Which bird, crex crex, has a cry which can be imitated by moving two notched bones across one another?

What does the name Agnes symbolise?