{"type":"rich","version":"1.0","title":"How a Fossil is Made","description":"Fossils and extinction: Students sequence the 5 basic steps of how a fossil is formed (organism dies, covered by sediment, minerals replace hard parts, erosion reveals). Each block has text and a simple illustrative image.","author_name":"Padlet TA","thumbnail_url":"https://arcade.padlet.com/open-graph/social-preview-image.png?timestamp=1767922009227&hashid=NRjbqWxYry","html":"<iframe src=\"https://arcade.padlet.com/embed/NRjbqWxYry\" width=\"720\" height=\"480\" frameborder=\"0\" allowfullscreen></iframe>","width":720,"height":480,"provider_name":"Padlet Arcade","provider_url":"https://arcade.padlet.com"}