Procedure. 1  Start with a short lecture on the nature of solid, liquid, and gaseous water. 2  Your goal is to give some understanding that water molecules themselves don't change when the state of the matter changes, but that the interaction between molecules changes.
Check out our guide of what to toss when. Is your important paperwork piling up? Check out our easy-to-use chart to see what to keep, what to toss, and how to store those hard-to-replace documents. Keep tax returns, as well as supporting documents like W-2 forms, receipts, and real estate closing statements for seven years.
Time Requirements for Tax Records. The rule for retaining tax returns and documents supporting the return is six years from the end of the tax year to which they apply. Your 2015 return and its supporting documents, for example, are safe to destroy at the end of 2021. There are situations that alter this rule.