6. Questions: Which side of the LED is the positive side? +, Short side, Long side
7. Questions: How else can you test which side is positive?, Place the battery between the two legs on the LED, Guess, Measure the two sides with a ruler, Break one of the legs so that it's a lot shorter than the other one
10. Questions: There won't be enough power to light each LED, Nothing each LED will still be very bright, What happens if there are too many LEDs on each battery?