SITUS PENTING UNTUK BAHAN KIR

- http://www.newtonsapple.tv/ arkeologi
- http://www.digonsite.com/quiz/index.html arkeologi
- http://www.usd.edu/anth/midarch/findsite.htm arkeologi
- http://www.si.umich.edu/CHICO/mummy/ membuat mumi
- http://www.eren.doe.gov/roofus/sundial.html membuat rancangan waktu
- http://ofcn.org/cyber.serv/academy/ace/sci/cecsci/cecsci149.html diameter matahari

- http://sps.k12.mo.us/khs/science/earth/lessons/astronomy/circum.htmmengukur bumi
- http://quest.arc.nasa.gov/lfm/events/starcensus.html bintang berkedip
- http://k12s.phast.umass.edu/ IPS
- http://hometown.aol.com/kidfun101/BkToSch/HolidayFunPg16BkToSch.html History