Ancient Climate by Brandon Turlington https://padlet.com/bratur6900/kipps5h3lq3z Earth/Env. Science 7.4 en-us 2018-03-15 15:09:35 UTC 2018-03-16 14:34:18 UTC hello@padlet.com How do scientists know what the climate was like in the distant past? bratur6900 https://padlet.com/bratur6900/kipps5h3lq3z/wish/242413621 2018-03-15 15:11:42 UTC https://padlet.com/bratur6900/kipps5h3lq3z/wish/242413621 Ice Cores bratur6900 https://padlet.com/bratur6900/kipps5h3lq3z/wish/242421125 Using air bubbles trapped in ancient ice, scientists are able to analyse the gases that were present during that time in history. It can help tell what the temperature was like from oxygen isotopes, and it can also tell how much CO2 and methane might have been in the atmosphere. ]]> 2018-03-15 15:22:04 UTC https://padlet.com/bratur6900/kipps5h3lq3z/wish/242421125 Fossilized Pollen bratur6900 https://padlet.com/bratur6900/kipps5h3lq3z/wish/242425870 Found in sediment cores, ancient pollen can be found. These pollen grains help scientists determine what kind of plants lived in that area. Thus helping to prove what kind of weather existed there.]]> 2018-03-15 15:28:44 UTC https://padlet.com/bratur6900/kipps5h3lq3z/wish/242425870 Glacial Evidence bratur6900 https://padlet.com/bratur6900/kipps5h3lq3z/wish/242427756 Evidence of ancient glaciers help to describe the conditions that existed in the past, specifically during the ice ages and immediately before/after. As glaciers move, they grind into rocks which can deposit sediments. They can show how fast the glaciers moved based on rising temperatures. ]]> 2018-03-15 15:31:20 UTC https://padlet.com/bratur6900/kipps5h3lq3z/wish/242427756 Tree Rings bratur6900 https://padlet.com/bratur6900/kipps5h3lq3z/wish/242837193 Trees rings from core samples of trees help to describe weather conditions from year to year of growth. Minimal growth can indicate drought. Black spots can mean fire or disease. Large amount of growth can mean good year for precipitation and ideal weather. ]]> 2018-03-16 14:26:11 UTC https://padlet.com/bratur6900/kipps5h3lq3z/wish/242837193 Sources bratur6900 https://padlet.com/bratur6900/kipps5h3lq3z/wish/242841461 https://www.ncdc.noaa.gov/news/how-do-scientists-study-ancient-climates
https://www.niwa.co.nz/climate/faq/how-do-we-determine-past-climate]]> 2018-03-16 14:33:22 UTC https://padlet.com/bratur6900/kipps5h3lq3z/wish/242841461