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.
Flash Player is a plugin you install on your computer that works with your web browser so you can view Flash content. It is commonly used to view content that was created on the Adobe Flash platform. Such content includes streaming audio and video, rich Internet media, and some web-based applications.