Does it matter whether the earth is old or young?  

The Bible indicates it is only about six thousand years old.  "Modern science" insists on a much older earth ... about four and a half billion years old.

If the Bible is wrong about such a seemingly simple thing, how can it be right about supernatural things? 

Many seekers ask the same question. Many youth ask the same question.  It is a stumbling block to many a would-be believer. 

If you have some time, please watch this video posted by Creation Ministries International.