Richter Magnitude is an estimate of the amount of energy released during and earthquake.
Upon completion of this activity you will be given the opportunity to receive a personalized Certificate as a "Virtual Seismologist." In order to get this certificate, you must make careful measurements throughout the activity.
The flexibility and adventure of life on the road hold tremendous allure for many retirees and even for some people still in the workforce if they have portable jobs. But people who haven’t previously lived full-time in an RV may find that the lifestyle is different from what they expected—the fact that someone has enjoyed RV vacations in the past is no guarantee that he/she will enjoy living in an RV long term. Five questions to ask yourself before you embark upon an RV retirement…
Will my partner and I get along well in close quarters?
This should provide the information to fix a relatively precise date for any Zippo lighter.
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From 1957-1965 the code configuration on the slim lighters differed from the regular lighters (See Date Code Chart below). The appearance of the word "Zippo" in the bottom stamp provides another clue to dating.
There have been three major changes, as shown in inset.