The$Earth,$Sun,$and$Moon$Study$Guide$

Name:_________________________$ $ $ Date:__________$ Use $ this guide to help you prepare for a test Thursday, March 16. The$____________________$is$found$at$the$center$of$our$solar$system.$$The$sun$is$made$of$ ___________________$and$______________________$that$is$held$together$by$gravity.$$$ $ $ The$sun’s$energy$comes$from$_________________________.$$This$is$when$two$or$more$ nuclei$fuse,$or$join$together,$to$form$a$new$nucleus.$$This$process$releases$a$huge$ amount$of$energy.$$In$the$sun,$two$hydrogen$nuclei$fuse$together$to$form$helium.$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ ______________________$are$cooler,$dark$spots$on$the$photosphere.$$The$sun’s$magnetic$ fields$slow$the$movement$of$gases.$$This$causes$certain$areas$of$the$photosphere$to$ become$_______________$than$others.$$Sunspots$can$affect$the$Earth’s$____________________.$ $ ______________________$are$extremely$hot,$bright$regions$on$the$sun’s$surface.$$$They$can$ extend$up$to$several$thousand$kilometers$within$only$a$few$______________________.$$ They$can$interfere$with$radio$and$television$______________________________.$$ $ $ $ $ Earth’s$moon$is$also$called$_____________________________.$$It$formed$4.6$billion$years$ago$ when$a$large$body$___________________$with$Earth.$$The$collision$blasted$a$part$of$ Earth’s$________________________$off$into$space.$$Over$time,$these$parts$____________________$ together$to$form$the$moon.$ $

As$the$moon$travels$around$the$Earth,$varying$amounts$of$_______________________$is$ reflected$by$it.$$This$causes$the$moon$to$appear$to$change$____________________.$$This$is$ called$________________________________.$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ An$_______________________$happens$when$the$shadow$of$one$body$in$space$falls$on$to$ another.$$A$________________________________$happens$when$the$moon$comes$between$the$ sun$and$Earth.$$Then,$the$shadow$of$the$moon$falls$on$part$of$the$Earth’s$ _____________________________.$ $ $ $ $ $ $ $ $ $ $ $ A$____________________________$happens$during$a$full$moon$when$the$moon$passes$ through$the$shadow$of$the$Earth. $