You've seen the series, you've studied the science, now here's your chance to win the earrings and necklace that the Rough Scientists created in New Zealand. They panned for it, extracted it, smelted and melted it, and now the gold could be yours!

Simply answer the questions and complete the tie-breaker to enter. All of the answers to the questions can be found on the Rough Science 3 website. Please make sure you read our terms and conditions before submitting your entry.

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1:	If a piece of gold is 75% pure, what carat would it be?
2:	If you were to make the metal detector, how many turns of wire are recommended on the former? (Hint - exact numbers please.)
3:	When creating a hand warmer, Mike Bullivant referred to calcium hydroxide Ca(OH)2. What is its common name?
4:	What did Mike Bullivant use to add fragrance to the hand cream?
5:	What was the name of the man who is credited with inventing the first seismograph?
6:	If you wanted to extract gold from rock, you would need some mercury. What is the pure form of man-made mercury sulfide pigment called? (Hint - it's valued by artists.)
7:	Tie-Breaker Suggest a new Rough Science challenge for two people to attempt in 24 hours (using a maximum of 30 words). The winning challenge may be attempted by the scientists in the next series.