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      <title>Hugtakakort  by Alda Guðmundsdóttir</title>
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      <description>RVN lota</description>
      <language>en-us</language>
      <pubDate>2022-03-02 12:20:57 UTC</pubDate>
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         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073444139</link>
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         <pubDate>2022-03-02 12:26:14 UTC</pubDate>
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      <item>
         <title>Eldur er eitt af grunnefnunum</title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073458681</link>
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         <pubDate>2022-03-02 12:37:03 UTC</pubDate>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073462863</link>
         <description><![CDATA[<div>Eldurinn er heitur vegna þess að við brunann sem myndast losnar orka í formi hita og ljóss, sem bæði yljar og lýsir (Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir 2019, bls. 147).</div>]]></description>
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         <pubDate>2022-03-02 12:40:10 UTC</pubDate>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073466309</link>
         <description><![CDATA[<div>Hægt er að kveikja eld með því að nudda saman tveimur tréhlutum nægilega hratt svo það myndist logi. Einnig er hægt að slá saman tveimur hörðum efnum, s.s. stál og stein og reyna þannig að mynda neista (Orri Vésteinsson, 2016).</div>]]></description>
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         <pubDate>2022-03-02 12:42:40 UTC</pubDate>
         <guid>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073466309</guid>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073471558</link>
         <description><![CDATA[<div>Súrefni er nauðsynlegt til að halda eldinum lifandi. Til að stöðva eldinn er hægt að hindra aðgengi súrefnis að eldinum (Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir, 2019, bls. 157).</div>]]></description>
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         <pubDate>2022-03-02 12:46:37 UTC</pubDate>
         <guid>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073471558</guid>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073473716</link>
         <description><![CDATA[<div>Til að viðhalda og auka eldinn er hægt að blása í hann. Með því er verið að flytja súrefni að eldinum (Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir, 2019, bls. 157).</div>]]></description>
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         <pubDate>2022-03-02 12:48:08 UTC</pubDate>
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      <item>
         <title>Sólin er brennandi eldhnöttur</title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073485994</link>
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         <pubDate>2022-03-02 12:56:28 UTC</pubDate>
         <guid>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073485994</guid>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073488905</link>
         <description><![CDATA[<div>Sólin er orkugjafi og lífgjafi jarðar (Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir, 2019, bls. 148).</div>]]></description>
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         <pubDate>2022-03-02 12:58:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073490214</link>
         <description><![CDATA[<div>Sólarljósið er 8 mínútur að ferðast frá sól til jarðar (Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir, 2019, bls. 149).</div>]]></description>
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         <pubDate>2022-03-02 12:59:37 UTC</pubDate>
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         <title>Norðurljósin</title>
         <author>heidahronnh</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073525996</link>
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         <pubDate>2022-03-02 13:21:33 UTC</pubDate>
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      <item>
         <title>Ljóstillífun</title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073544623</link>
         <description><![CDATA[]]></description>
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         <pubDate>2022-03-02 13:31:25 UTC</pubDate>
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      <item>
         <title></title>
         <author>heidahronnh</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073545276</link>
         <description><![CDATA[<div>Sólin sendir frá sér, í sólgosum, straum hlaðinna róteinda og rafeinda, það kallast sólvindur. Hluti af þessum ögnum sleppur inn í segulsvið jarðar og rekast á lofthjúpinn. Við þessa árekstra losnar orka sem myndar norðurljósin. (Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir, 2019, bls. 153).</div>]]></description>
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         <pubDate>2022-03-02 13:31:44 UTC</pubDate>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073589263</link>
         <description><![CDATA[<div>Efnaferillinn sem á sér stað við ljóstillífun er sá þegar ólífræn efni verða að lífrænum efnum með aðstoð orku frá sólinni (Fabricius o.fl., 2011/2014, bls. 6).</div>]]></description>
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         <pubDate>2022-03-02 13:52:14 UTC</pubDate>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073618048</link>
         <description><![CDATA[<div>Þetta ferli lýsir ljóstillífun: Koltvíoxíð + vatn + sólarorka + glúkósi + súrefni (Fabricius o.fl., 2011/2014, bls. 6).</div>]]></description>
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         <pubDate>2022-03-02 14:05:55 UTC</pubDate>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073631942</link>
         <description><![CDATA[<div>Við ljóstillífun sameinast koltvíoxíð og vatn, svo það sé hægt þarf orku. Orkan er fengin úr úr geislum sólarinnar (Fabricius o.fl., 2011/2014, bls. 8).</div>]]></description>
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         <pubDate>2022-03-02 14:11:40 UTC</pubDate>
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      <item>
         <title></title>
         <author>heidahronnh</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073657619</link>
         <description><![CDATA[<div>Litur norðurljósana fer eftir örvuðu súrefni og örvuðu nitri (Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir, 2019, bls. 153).</div>]]></description>
         <enclosure url="" />
         <pubDate>2022-03-02 14:23:03 UTC</pubDate>
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      <item>
         <title></title>
         <author>heidahronnh</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073677908</link>
         <description><![CDATA[<div>Litirnir í norðurljósnunum eru græn, fjólublá, blá, rauð, bleik og gul (Stjörnufræðivefurinn, e.d.).</div>]]></description>
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         <pubDate>2022-03-02 14:31:52 UTC</pubDate>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073688864</link>
         <description><![CDATA[<div>Þegar við hugsum um plöntur dettur okkur oft í hug blóm, jurtir og tré, en ljóstillífun á sér einnig stað í vatni (Fabricius o.fl., 2011/2014, bls. 9).</div>]]></description>
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         <pubDate>2022-03-02 14:36:44 UTC</pubDate>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073701116</link>
         <description><![CDATA[<div>Græni liturinn á plöntum er vegna þess að plöntur gleypa í sig rauða og bláa lit ljóssins en endurkasta græna litnum. (Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir, 2019, bls. 151).</div>]]></description>
         <enclosure url="" />
         <pubDate>2022-03-02 14:42:26 UTC</pubDate>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073709229</link>
         <description><![CDATA[<div>Vatn drekkur einstaka liti sólarljóssins í sig mishratt (Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir, 2019, bls. 149).</div>]]></description>
         <enclosure url="" />
         <pubDate>2022-03-02 14:46:15 UTC</pubDate>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073713799</link>
         <description><![CDATA[<div>Rauði liturinn hverfur fyrstur, oftast við 20 metra dýpi. Á 180 metra dýpi hverfur blái liturinn alveg (Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir, 2019, bls. 150).</div>]]></description>
         <enclosure url="" />
         <pubDate>2022-03-02 14:48:18 UTC</pubDate>
         <guid>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2073713799</guid>
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      <item>
         <title></title>
         <author>heidahronnh</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2075616172</link>
         <description><![CDATA[<div>Norðurljós koma aðallega fram innan norðurljósabeltisins. Það er um 2000km frá segulpólnum og um 500 km breitt (Stjörnufræðivefurinn, e.d.).</div>]]></description>
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         <pubDate>2022-03-03 11:35:08 UTC</pubDate>
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      <item>
         <title></title>
         <author>heidahronnh</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2075623491</link>
         <description><![CDATA[<div>Hægt er að sjá norðurljósin allastaðar á Íslandi svo lengi sem norðurljósabeltið er yfir landinu. Það þarf að vera heiðskýrt og myrkur svo norðurljósin séu sýnileg (Stjörnufræðivefurinn, e.d.).</div>]]></description>
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         <pubDate>2022-03-03 11:40:38 UTC</pubDate>
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      <item>
         <title>Heimildaskrá</title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2075689192</link>
         <description><![CDATA[<div>Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir. (2019). <em>Náttúruþankar.</em> Bókaútgáfan Hólar.<br><br>Fabricius, S., Holm, F., Mårtensson, R., Nilsson, A. og Nystrand, A. (2014). <em>Maður og náttúra, litróf náttúrunnar</em> (Hálfdán Ómar Hálfdánarson þýddi). Menntamálastofnun. (Upphafleg gefið út 2011). <a href="https://vefir.mms.is/flettibaekur/namsefni/madurognattura/3/#zoom=z">https://vefir.mms.is/flettibaekur/namsefni/madurognattura/3/#zoom=z</a><br><br>Orri Vésteinsson. (2016, 25. maí). <em>Hvernig kveiktu „fornmenn“ á Íslandi eld?</em>. Vísindavefurinn. <a href="https://www.visindavefur.is/svar.php?id=71754">https://www.visindavefur.is/svar.php?id=71754</a><br><br>Stjörnufræðivefurinn. (e.d.). <em>Norðurljós.</em><a href="https://www.stjornufraedi.is/solkerfid/jordin/nordurljos/"> https://www.stjornufraedi.is/solkerfid/jordin/nordurljos/</a><br><br><a href="https://vefir.mms.is/flettibaekur/namsefni/madurognattura/3/#zoom=z"><br></a><br></div>]]></description>
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         <pubDate>2022-03-03 12:30:11 UTC</pubDate>
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      <item>
         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2075845914</link>
         <description><![CDATA[<div>Sólkerfið er myndað af sólinni og reikistjörnum (Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir, 2019, bls. 148).</div>]]></description>
         <enclosure url="" />
         <pubDate>2022-03-03 13:58:28 UTC</pubDate>
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         <title></title>
         <author>aldayrg</author>
         <link>https://padlet.com/aldayrg/tmrvgcxp001trhz8/wish/2075848875</link>
         <description><![CDATA[<div>Sólkerfin mynda vetrarbrautina og vetrarbrautin myndar alheiminn (Bjarni E. Guðleifsson og Brynhildur Bjarnadóttir, 2019, bls. 148).</div>]]></description>
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         <pubDate>2022-03-03 13:59:48 UTC</pubDate>
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