Ask what function the burning candle served in the activity. To show the effects of burning fossil fuels on the atmosphere, a simple activity involving a candle burned inside a large, clear jar with temperature and CO2 probes inserted Another large pickle jar with the same probes filled with regular atmospheric air serves as a control. A sunlamp is directed on both jars and both CO2 and temperature are recorded for 30-45 minutes. The lamp is shut off and the CO2 and temperature are again recorded for 30-45 minutes. If a CO2 probe is not available, using the limewater will show the presence of CO2 by turning cloudy.
Ingestion can cause severe damage to the G.I. tract.
Activity III should be used after this. Set up two large jar as shown in the picture on accompanying page. Light the candle in the second one and let it burn for five minutes. Blow out the candle and quickly tightly shut the lid to trap the smoke. Shine a sunlamp on both the jars so that both are equally heated by the lamp.