Lost on the Moon

To get our brains thinking, we had to order 15 specific items we had after 'crash landing' on the moon.  We had to order them from being the most important to the least.  Then we had to justify our reasoning.  After discussing our ideas with each other, some of our thinking changed.  The 15 items were:

What order would you put these items in?  Most of us thought the most important items was oxygen and the least important, the box of matches.