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One of the main methods to study past climates is to investigate ice from the depths of the polar ice caps or glaciers.<\/span><\/p>\n"},"subContentId":"56e89a93-5801-469a-8a74-6753a79aebde","metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"}},"alwaysDisplayComments":false,"backgroundOpacity":50,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""}],"slideBackgroundSelector":{"imageSlideBackground":{"path":"images\/image-3Zs9E5bv.png","mime":"image\/png","copyright":{"license":"PD","author":"Earth observatory NASA","source":"https:\/\/earthobservatory.nasa.gov\/images\/149627\/antarctic-sea-ice-reaches-record-low"},"width":720,"height":545}}},{"elements":[{"x":0,"y":92.5260471581593,"width":63.18082788671024,"height":6.455305615685532,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Helle Astrid Kj\u00e6r<\/a>, Ice core researchers from AWI drilling at the EastGRIP ice core site, Greenland 1<\/a>, CC BY 4.0<\/a><\/span><\/p>\n"},"subContentId":"9c571f5a-b802-4ba2-a39b-7ff103043f03","metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"}},"alwaysDisplayComments":false,"backgroundOpacity":50,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":23.965141612200437,"y":38.73183369411319,"width":55.55555555555556,"height":19.365916847056596,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Scientists extract long cylinders of ice called ice cores.<\/span><\/p>\n"},"subContentId":"e8bae601-1a69-4e1f-8fa9-024a9dff6765","metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"}},"alwaysDisplayComments":false,"backgroundOpacity":50,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""}],"slideBackgroundSelector":{"imageSlideBackground":{"path":"images\/image-dLjlJ0g5.jpg","mime":"image\/jpeg","copyright":{"license":"CC BY-SA","title":"Ice core researchers from AWI drilling at the EastGRIP ice core site, Greenland","year":"2017","author":"Helle Astrid Kj\u00e6r","version":"4.0","source":"https:\/\/commons.wikimedia.org\/wiki\/File:Ice_core_researchers_from_AWI_drilling_at_the_EastGRIP_ice_core_site,_Greenland_1.jpg"},"width":4752,"height":3168}}},{"elements":[{"x":0,"y":92.5260471581593,"width":44.66230936819172,"height":6.455305615685532,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Helle Astrid Kj\u00e6r<\/a>, Shallow ice core drilling (danish Hans Tausen drill) 2<\/a>, CC BY 4.0<\/a><\/span><\/p>\n"},"subContentId":"0d9943da-1c4c-4305-810e-00277a2886ea","metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"}},"alwaysDisplayComments":false,"backgroundOpacity":50,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":10.893246187363834,"y":60.249519079731634,"width":80.61002178649238,"height":25.821222462742128,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Each year, an average of 10 to 20 cm of snow is deposited in Antarctica. The deeper you dig, the older the ice samples recovered. <\/span><\/p>\n"},"subContentId":"67f06e72-a96d-444c-b61c-0a6a6286a4e0","metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"}},"alwaysDisplayComments":false,"backgroundOpacity":60,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""}],"slideBackgroundSelector":{"imageSlideBackground":{"path":"images\/image-5HVPMEUr.jpg","mime":"image\/jpeg","copyright":{"license":"CC BY-SA","title":"Shallow ice core drilling (danish Hans Tausen drill)","author":"Helle Astrid Kj\u00e6r","year":"2017","version":"4.0","source":"https:\/\/commons.wikimedia.org\/wiki\/File:Shallow_ice_core_drilling_(danish_Hans_Tausen_drill)_2.jpg"},"width":4752,"height":3168}}},{"elements":[{"x":8.714596949891067,"y":62.40128761829348,"width":81.69934640522877,"height":19.365916847056596,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

The deepest drillings provide ice that is several hundred thousand years old. <\/span><\/p>\n"},"subContentId":"dd93427f-c83d-4909-87df-9a45d53bb9c9","metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"}},"alwaysDisplayComments":false,"backgroundOpacity":60,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":0,"y":92.5260471581593,"width":41.394335511982575,"height":6.455305615685532,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Hannes Grobe<\/a> 07:59, 27 October 2007 (UTC), CRP derrick hg<\/a>, CC BY-SA 2.5<\/a><\/span><\/p>\n"},"subContentId":"b3ccf039-fd37-4dda-9fa4-2097e839ef66","metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"}},"alwaysDisplayComments":false,"backgroundOpacity":50,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""}],"slideBackgroundSelector":{"imageSlideBackground":{"path":"images\/image-fscpKRN1.jpg","mime":"image\/jpeg","copyright":{"license":"CC BY-SA","title":"CRP derrick hg","year":"1998","author":"Hannes Grobe","source":"https:\/\/de.wikipedia.org\/wiki\/Datei:CRP_derrick_hg.jpg","version":"4.0"},"width":1755,"height":1755}}},{"elements":[{"x":22.875816993464053,"y":8.607074154247377,"width":54.46623093681917,"height":10.758842692809221,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

The falling snow trapped tiny air bubbles.<\/span><\/p>\n"},"subContentId":"a1a38f89-dc29-4105-aeef-5ffd85dc2b60","metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"}},"alwaysDisplayComments":false,"backgroundOpacity":50,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":0,"y":92.5260471581593,"width":30.501089324618736,"height":6.455305615685532,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

NASA's Goddard Space Flight Center\/Ludovic Brucker.<\/span><\/p>\n"},"subContentId":"f3698fe6-0709-43fd-9aee-09ddc706d904","metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"}},"alwaysDisplayComments":false,"backgroundOpacity":50,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""}],"slideBackgroundSelector":{"imageSlideBackground":{"path":"images\/image-s5IxYnG3.jpg","mime":"image\/jpeg","copyright":{"license":"PD","title":"An ice core segment","year":"2013","source":"http:\/\/www.nasa.gov\/content\/goddard\/enormous-aquifer-discovered-under-greenland-ice-sheet\/index.html","author":"NASA's Goddard Space Flight Center\/Ludovic Brucker"},"width":3896,"height":3000}}},{"elements":[{"x":58.60566448801743,"y":0,"width":41.394335511982575,"height":32.27652807842766,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

The past atmosphere's carbon dioxide, methane, and oxygen composition can then be determined.<\/span><\/p>\n"},"subContentId":"0c761814-7a5f-4a30-bd97-395753ed50bd","metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"}},"alwaysDisplayComments":false,"backgroundOpacity":70,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":0,"y":92.5260471581593,"width":22.875816993464053,"height":6.455305615685532,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Photographer : Atmospheric Research<\/span><\/p>\n"},"subContentId":"1cba1d1d-19ce-4aaa-9ee9-dd7c20b330c5","metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"}},"alwaysDisplayComments":false,"backgroundOpacity":60,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""}],"slideBackgroundSelector":{"imageSlideBackground":{"path":"images\/image-u9hnCpjJ.jpg","mime":"image\/jpeg","copyright":{"license":"CC BY-SA","title":"Air Bubbles Trapped in Ice","source":"https:\/\/www.scienceimage.csiro.au\/image\/518","version":"3.0","author":"Atmospheric Research, CSIRO","year":"2000"},"width":2464,"height":1686}}},{"elements":[{"x":60.02178649237473,"y":0,"width":39.99869281045751,"height":45.187139309798724,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Scientists have observed that climate change is linked to changes in the composition of the atmosphere and the presence of more or less carbon dioxide.<\/span><\/p>\n"},"subContentId":"5c37701d-3ad3-4cf1-a8f9-c7f035572e5d","metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"}},"alwaysDisplayComments":false,"backgroundOpacity":70,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":0,"y":92.52604715815929,"width":22.875816993464053,"height":6.455305615685532,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Photographer : Atmospheric Research<\/span><\/p>\n"},"metadata":{"contentType":"Text","license":"U","title":"Unbenannt: Text"},"subContentId":"586f00fb-e4cd-4066-91f7-420560e2654a"},"alwaysDisplayComments":false,"backgroundOpacity":60,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""}],"slideBackgroundSelector":{"imageSlideBackground":{"path":"images\/image-mdCH5GJs.jpg","mime":"image\/jpeg","copyright":{"license":"U"},"width":2464,"height":1686}}},{"elements":[{"x":9.803921568627452,"y":68.85659323397901,"width":80.61002178649238,"height":19.365916847056596,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Greenhouse Effect and Temperature - H5P activity