Question: Find the location of a nearby barometer. Go there and measure the pressure of the atmosphere. Make a careful drawing of the pointer and scale on the barometer showing the pressure as you read it.
If no barometer is available, you can go to almost any weather website and find the current atmospheric pressure for the nearest weather station. Now, to run yourself through all these terms and units, make a table with two rows and eight columns. In the first row label each column with the name of a unit of pressure. Using the appropriate units, put the value of the pressure that you measured into each column of the second row. Why is the number you measured different from the value of the "standard atmosphere"?