Chapter 20 â Planetary Motion What would happen if the Earthâs orbit changed? I. History of our position in the universe 2nd Century A.D. â Ptolemy â Earth is the center…
List 4 Prefixes List 4 Prefixes bi--, extra--, il--, and mis-- Day 1 *bi-- two; halves *bimonthly-- twice a month or every two months *bisect-- to divide into two equal parts…