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.
Therefore, you may want to keep copies of tax returns with underlying documentation (receipts and checks) for at least six years, and keep copies of your W-2s forever (as a record of Social Security payments).here are certain records you should keep for longer periods, including: 1  Records relating to the basis of property, which you should keep for the period of limitations that applies to the income tax return of the year in which you sold or disposed of the property.