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.
Cards Against Humanity is a party game in which players complete fill-in-the-blank statements using mature-content phrases printed on playing cards. The game is available as a free download that players can print to create their own cards, and also available to purchase in published hardcopy.