| Phase: |
Before/Engage, During/Explore/Explain |
| Activity: |
For complete lab handouts click this link. access code: earth Materials: Graph paper, ruler, pen, pencil, calculator (Optional: BYOD device, Internet connection) Step 1 Procedure: - Plot on graph paper, time (year) on the x axis and temperature (oC) on the y axis.
- Ensure that you scale appropriately, correctly label the X and Y-axes, and properly title the graph.
The following information shows the average winter temperature in central England from 900–1900 AD. Year 900 950 1000 1050 1100 1150 1200 1250 1300 1350 Temp (º C) 3.45 3.55 3.62 3.69 3.58 3.69 4.12 4.09 4.05 3.81 Year 1400 1450 1500 1550 1600 1650 1700 1750 1800 1850 1900 Temp (º C) 3.63 3.46 3.65 3.50 3.21 3.18 3.38 3.55 3.47 3.66 3.97 Historical climate data chart reproduced with permission from the Annenberg Foundation. Step 2 Procedure: 1. Mathematical Extension: Convert oC to oF from the data table above 2. You can either use the Temperature Conversion Website or the formulas listed below: T(°F) = T(°C) × 9/5 + 32 or T(°F) = T(°C) × 1.8 + 32 Step 3 Procedure: Graph the same data with the temperature now in oF - Plot on graph paper, time (year) on the x axis and temperature (oC) on the y axis.
- Ensure that you scale appropriately, correctly label the X and Y-axes, and properly title the graph.
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| Assessment Strategies: |
Visual for Graphical Analysis: The graphs should be the same shape with the same trends. If not, then this indicates that the student either (1) did not convert correctly or (2) the student did not graph correctly or (3) both of the above. Since this is easily seen with a quick look at the graphs, it can be quickly corrected and the student put back on the correct path. Once graphs have been plotted Questions: 1. The period 1550-1700 in Europe is known as the Little Ice Age. Cite graphical data (from the above graph) to support this claim. POSSIBLE ANSWER: The Average Winter Temperature (Celsius) in Central England graph shows a decisively downward trend in the climate data at this point in time (1550-1700). At the lowest point it is 0.32oC lower than at the start of the 1550 period. 2. Observe the graph, what is the overall trend of the entire graph (use words like increase, decrease, glacial and inter-glacial in the answer)? POSSIBLE ANSWER: At the beginning of the graph the data shows an upward trend (with a slight decrease) from 900-1200. This could indicate an inter-glacial period in time. The time frame from 1200-1500 shows a warm period in the graph (with a slight dip noted). However the time frame also indicates that the temperatures were cooling from its highest around 1200. This could indicate a glacial period is about to occur. In the years 1550-1700 the temperature decreases quickly indicating a glacial period (due to temperatures). From 1700 to 1900 (when the graph stops) the temperature was indicating an increase in temperature. This indicates an inter-glacial period. In 1900 when the graph stops, the temperature was still lower at 3.97oC than the highest at 4.12oC in 1200. 3. Postulate a theory as to why the temperature during this time frame is so cold (REMEMBER you may have to do outside research to help finish this question)? POSSIBLE ANSWER: The time frame from 900 to 1900 indicates two periods of time. First is the Medieval Warming Period and the Little Ice Age. The time of the Little Ice Age 1150-1700 was, according to Global Temperatures (2500 BC to 2007 AD) from the chart, a very cold time on the planet. There were at least 90 major volcanic eruptions during this time with 4 in 1660 alone. The solar irradiation was decreased due to the amount of volcanic debris and the temperatures on the planet dropped. During the Little Ice Age, the Maunder Minimum, also known as the "prolonged sunspot minimum", (1645-1715) occurred. This time frame was when sunspots became exceedingly rare, as noted by solar observers of the time. The observers reported fewer than 50 sunspots. Modern amounts are around 40,000-50,000 for the same time frame. With volcanic activity increasing, sunspot activity decreasing and volcanic debris blocking solar radiation, the temperatures decreased in this area. Reflection Question (Writing): Support this statement: “To predict the climate of the future, one must know the climate of the past.” (Cite evidence) POSSIBLE ANSWER: In the Question #3 in the previous question set, the data reported came from the past. The current climate predictions, use past data collected as well as current data and then feed that data into climate model predictors to see the trends that might develop. Climate changes how species interact with one another—and not just today or in the future, but also in the past. Scientists study trends from fossil records to understand how climate change impacted the past and to identify ways to predict how things may change in the future. Climate modeling occurs because we want to know how to respond to the changes that are occurring around us. However, if the future is highly novel and difficult to model, then it’s also hard to predict. |
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| Advanced Preparation: |
The links below provide the original locations for information provided in the activity. The Annenberg Foundation was kind enough to allow me to use the table provided in the activity. The online conversion link is where temperature conversions can be made; you may want to become familiar with what the website looks like prior to activity. The Climate Depot website is a link to information that can be used to answer some of the questions in the activity. You may want to read the entire article before the activity. It has good information that you may choose to incorporate into your lesson. The Science Reporter is the same as the Climate Depot. It is also a link to information that can be used to answer some of the questions in the activity. You may want to read the entire article before the activity. It has good information that you may choose to incorporate into your lesson. “Courses Environmental Science Support Guide Unit 12: The Habitable Planet.” Annenberg Learner, The Annenberg Foundation, 2017, www.learner.org/. Fogt., Robert. “Temperature Conversion.” Online Conversion - Temperature Conversion, Online Conversion, 23 Feb. 2018, www.onlineconversion.com/temperature.htm. Marohasy, Jennifer, and Mark Morano. “New Study: ‘Multiple Lines of Evidence’ Show Medieval Warm Period Was Warmer than Today.” Climate Depot, CFACT.org, 22 Aug. 2017, 1:07AM, http://www.climatedepot.com/2017/08/22/new-study-multiple-lines-of-evidence-show-medieval-warm-period-was-warmer-than-today/. SCIENCE REPORTER. “Tree-Rings Prove Climate Was WARMER in Roman and Medieval Times than It Is Now - and World Has Been Cooling for 2,000 Years.” Daily Mail.com, Associated Newspapers Ltd, 20 July 2012, 18:51 EST, http://www.dailymail.co.uk/sciencetech/article-2171973/Tree-ring-study-proves-climate-WARMER-Roman-Medieval-times-modern-industrial-age.html Review BYOD/Internet acceptable use policies established either by teacher, school, district, or a variation of the above. |
| Variation Tips (optional): |
Extension Question: From 1150-1350 AD the graph (created within the activity) indicates a warm period. This is known as the Medieval Warm Period. Since industrialization had not occurred yet, what are some logical deductions as to what may have contributed to this warming period? Compose a viable response with at least two credible explanations. (Cite evidence.) POSSIBLE ANSWER: The time frame from 900 to 1900 indicates two periods of time. First is the Medieval Warming Period and the Little Ice Age. Possible causes of the Medieval Warm Period include increased solar activity, decreased volcanic activity, and changes to ocean circulation. The Medieval Warm Period, corresponds to a period of high solar activity; a time when sunspots occurred in abundance. This time frame also indicates few volcanic eruptions that would interfere with solar radiation reaching the planet. Both the high frequency of sunspots and the decrease in volcanic activity would be credible reasons for the Medieval Warm Period. |
| Notes or Recommendations (optional): |
Recommend reading information from the links listed. Important Points: · Scientists have evidence that the global climate has changed in the past. Climate is subjective, it has/had natural changes (even before the idea of greenhouse gas emissions). · Global temperature is gradually changing according to the long-term temperature records. · The climate is a very complex system; therefore, there are no accurate predictions of what will happen to the Earth’s climate with an increase in CO2 levels (greenhouse gas). · Climatologists have been using a combination of mathematical models, the geological record of past climates, meteorological records and theories on the global atmospheric and oceanic circulation to provide an estimate for past, current, and future values. |
