Can I use the Earth Science 1st Edition textbook with the 2nd Edition notebooking journal? What are the grade levels for Earth Science? What materials are needed to teach Earth Science, 2nd Edition? What updates have been made to Exploring Creation with Earth Science, 2nd Edition? Who are the authors of Earth Science and what are their qualifications? Will the Earth Science 2nd Edition activity videos be compatible with the previous edition? Will the Earth Science 2nd Edition activity videos be compatible with the previous edition?