Pointâofâsale transactionsâi.e., swiping a card at the time of purchaseâsecurely encrypt the. credit card data. Cards placed on file for future transactions, such as for express checkâout, use. tokens to access card data.
The outermost layer of Earth is the atmosphere. I say the atmosphere is the outermost layer, because it is as much a part of the of our planet as the atmosphere of other planets is a part of their definition.
Earthâs interior is divided into three concentric layers;Crust, mantle and core. Crust is the thinnest and outermost layer, mantle middleone whereas core is the innermost and the most dense layer of the earth. Thematerial of the crust is composed of rocks. Rock is composed of one or moreminerals.