A new model explaining this mysterious process suggests the core was created as dribs and drabs of iron percolated inward from Earth's lower mantle, according to a study published Oct. 6 in the journal Nature Geoscience. The mantle is the viscous, rocky layer between the crust and Earth's iron core.
Definition of flash card. : a card bearing words, numbers, or pictures that is briefly displayed (as by a teacher to a class) usually as a learning aid.
Basics of Snap. Snap is a card game that is played with anything from 2-12 players. Traditionally, the game is played using a normal 52-deck pack of cards, however, you can use more cards if you choose. The goal of the game is to own all of the cards in play.