the atmosphere traps heat. Identify the gases in the atmosphere that like the glass in a Earth’s “act” greenhouse. Optional: , Explore: Teacher Preparation: Drill the caps of the bottles to the same diameter as your thermometer. Place the thermometers through the holes in the caps several inches. Use the modeling clay to hold the thermometers in place and seal the hole. Number bottles #1, #2, #3, and #4. Name:___________________________________________ Period: _______Date: ____________ Procedure: For your source of carbon dioxide, use the following methods quickly to ensure CO2 is captured: Bottles #1 and #2 - Carefully mix 10 grams of baking soda and 50 mL vinegar in a flask. Cover with balloon to capture the CO2. Add 50 mL water to bottle #1. Release the CO2 into bottle #1 and cover with cap quickly. Repeat the procedure for the bottle #2. Bottles #3 and #4 Pour10 grams of baking soda into each bottle. Now add 50 mL of water to – each bottle. Place the caps with thermometers onto the tops of the bottles. Place bottles in sunlight. Make sure they receive the same amount of sun. NOTE: a heat lamp may be substituted for the sun, but you must be very careful to place the bottles the same distance exactly from the lamp. Shade the thermometers by putting a strip of opaque tape on the outside of the bottles. The tape must be the same length on all bottles. Measure the temperature of the bottles over time. Record the temperature of each bottle every five minutes for a half hour Data Table Dry Wet Elapsed Time in Bottle 1 Bottle 2 Bottle 3 Bottle 4 minutes Initial 5 10 15 20 25 30 Explain: Conclusion Interpret the graph and identify a trend for the change in temperature for each container during the experiment? Did both jars show the same change in temperature? Calculate the change in temperature for each jar. Did your results support your hypothesis? Explain why the temperature of the covered jar showed an increase in temperature. What part of this setup contributed to the increase in temperature?
the Earth’s atmosphere traps heat. Identify the gases in the atmosphere that “act” like the glass in a greenhouse. Optional: , Explore: Teacher Preparation: Drill the caps of the bottles to the same diameter as your thermometer. Place the thermometers through the holes in the caps several inches. Use the modeling clay to hold the thermometers in place and seal the hole. Number bottles #1, #2, #3, and #4. Name:___________________________________________ Period: _______Date: ____________ Procedure: For your source of carbon dioxide, use the following methods quickly to ensure CO2 is captured: Bottles #1 and #2 - Carefully mix 10 grams of baking soda and 50 mL vinegar in a flask. Cover with balloon to capture the CO2. Add 50 mL water to bottle #1. Release the CO2 into bottle #1 and cover with cap quickly. Repeat the procedure for the bottle #2. Bottles #3 and #4 – Pour10 grams of baking soda into each bottle. Now add 50 mL of water to each bottle. Place the caps with thermometers onto the tops of the bottles. Place bottles in sunlight. Make sure they receive the same amount of sun. NOTE: a heat lamp may be substituted for the sun, but you must be very careful to place the bottles exactly the same distance from the lamp. Shade the thermometers by putting a strip of opaque tape on the outside of the bottles. The tape must be the same length on all bottles. Measure the temperature of the bottles over time. Record the temperature of each bottle every five minutes for a half hour Data Table Dry Wet Elapsed Time in minutes Bottle 1 Bottle 2 Bottle 3 Bottle 4 Initial 5 10 15 20 25 30 Explain: Conclusion Interpret the graph and identify a trend for the change in temperature for each container during the experiment? Did both jars show the same change in temperature? Calculate the change in temperature for each jar. Did your results support your hypothesis? Explain why the temperature of the covered jar showed an increase in temperature. What part of this setup contributed to the increase in temperature?
Grade_8_Essential%20Labs%202014-2015.docx