Earth Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.Anti-spam check. Do not fill this in! === Gravitational field === {{Main|Gravity of Earth}} The [[gravity of Earth]] is the [[acceleration]] that is imparted to objects due to the distribution of mass within Earth. Near Earth's surface, [[gravitational acceleration]] is approximately {{convert|9.8|m/s2|abbr=on}}. Local differences in topography, geology, and deeper tectonic structure cause local and broad regional differences in Earth's gravitational field, known as [[Gravity anomaly|gravity anomalies]].<ref>{{cite journal |first1=A. B. |last1=Watts |first2=S. F. |last2=Daly |title=Long wavelength gravity and topography anomalies |journal=Annual Review of Earth and Planetary Sciences |volume=9 |pages=415β418 |date=May 1981 |issue=1 |doi=10.1146/annurev.ea.09.050181.002215 |bibcode=1981AREPS...9..415W}}</ref> Summary: Please note that all contributions to Christianpedia may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here. You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see Christianpedia:Copyrights for details). Do not submit copyrighted work without permission! Cancel Editing help (opens in new window) Discuss this page