(}ýI>š HHú@ÿñÿî R*(ü,, g `d'ÿÂÿµ ¥ «2424€LÝ 6Ql‡¢D`' ÿUNIT 11 Lab Acitivity #5 GROUP #  Changes in Temperature ( NAME  + PERIOD   DATE   EQUIPMENT:  Thermometer  Timer  Two 12 oz. tumblers  Ice  Hot water source  Paper and pencil  Calculator  PROBLEM:F Changes in temperature are expressed as signed numbers two different Lways. One, as a direct measurement, -5¡ C when it is below freezing, for Fexample, and +26¡C , on a pretty hot day. Another way signed numbers Creflect temperatures, is in changes in tempeeratures; increases as Gpositives, and decreases as negatives. In this lab activity, you will Dmeasure and graph temperature changes over periods of time, showing Kpositive increases and negative decreases. Beginning at a starting point, Hyou will add signed numbers throughout the activity and arrive at your  ending point.   PROCEDURE:= A. Begin by reading and recording room temperature on your Ethermometer. Set up your two tumblers - one with ice water and the other with hot water. K B. Place the thermometer first in the cold water leaving it in place for >3 minutes. Record the temperature and the temperature change.F Next place the thermometer in the hot water leaving it in place for >3 minutes. Record the temperature and the temperature change.F Continue this cycle of cold/hot readings three more times, using 3 Dminutes intervals and recording the temperature and the temperature change., J C. After recording your data on the graph, connect the data points with 3straight lines. (Cold to hot to cold to hot, etc.)      H D. Using your calculator, check that you can begin with your starting Dpoint (that was the room temperature), add the temperature changes Kthroughout the activity (both positive and negative) and arrive at your  end point.  ARoom Temp + ( ) + ( ) + ( ) + ( ) +   Q ( ) + ( ) + ( ) + ( ) = ____________ T End Point I E. Draw a line closely connecting the high points on your graph (these are the hot water points).F Draw a second line closely connecting the low points (ice water points). E What would happen to your graph if you continued this activity?       Why?