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.
Most businesses accumulate a large number of documents on a monthly basis -- such as financial statements, receivables, payables, insurance paperwork and employee records. Documents pertaining to paid accounts are important to keep, because they show debits for goods and services the company has paid off.ecord-Keeping Time Frame. The main reason a business should retain financial documents from prior years is in the case of an audit by the IRS. The IRS states that except in the case of fraud, it has three years from the date of a business filing a return to perform an audit.