That's because Earth is relatively far from the sun, but Io is very close to giant Jupiter. Have the students bend their paperclips back and forth rapidly, causing the bent end to heat up. Next, divide the class into groups of 3 to 6. Distribute a bag of dried fruit to each group. Have them open the bag and sniff the contents.
Some people describe the odor of sulfur dioxide as similar to that of a just-struck match.