http://www.myflug.is/is/um-okkur/frettir/eldgos-i-holuhrauni
http://www.vb.is/eftirvinnu/heitir-reitir-og-kaldir/80945/
https://is.wikipedia.org/wiki/M%C3%B6ttull
http://www.stjornufraedi.is/solkerfid/jordin
http://www.visindavefur.is/svar.php?id=59267
https://is.wikipedia.org/wiki/J%C3%B6r%C3%B0in#/media/File:Earth-crust-cutaway-icelandic.png
http://drangey.weebly.com/landafraeligethi---4-kafli.html
Fa.is
http://www.visindavefur.is/svar.php?id=3811
Um víða veröld
Höfundur: Hilmar Egill Sveinbjörnsson
Útgáfuár: 2015
Námsgagnastofnun
http://www.vb.is/eftirvinnu/heitir-reitir-og-kaldir/80945/
https://is.wikipedia.org/wiki/M%C3%B6ttull
http://www.stjornufraedi.is/solkerfid/jordin
http://www.visindavefur.is/svar.php?id=59267
https://is.wikipedia.org/wiki/J%C3%B6r%C3%B0in#/media/File:Earth-crust-cutaway-icelandic.png
http://drangey.weebly.com/landafraeligethi---4-kafli.html
Fa.is
http://www.visindavefur.is/svar.php?id=3811
Um víða veröld
Höfundur: Hilmar Egill Sveinbjörnsson
Útgáfuár: 2015
Námsgagnastofnun