For those familiar with Only Connect, you will know that you have to place the 16 things in the grid below into four groups of four based on some connection between them. To be completely correct you have to find the four correct groups (and there are some red herrings in there) and the connection for each of the four groups.
The four groups and their connections are:
Saturn, Ariane, Soyuz and Long March - Rockets
Mercury, Lead, Tungsten and Iron - Metals
Silver, Lime, Sand and Step - can all be preceded by Quick
Emerald, Sea, Apple and Bottle - Shades of Green