Misc: a cesium atom in an ---------- clock beats 9,192,631,770 times a second?

Questions

selva is another name for what?

what line on a weather map links all points of equal pressure?

pantelleria, ustica and lampedusa are all islands belonging to which country?

what kind of cowboy was john voight in 1969?

who plays 'norman bates' in hitchcock's classic thriller psycho?