Check out the "Field Day Bonus" section at the end of the May 27 journal entry. There are two pictures of a set of gas vials there. Your first task is to figure out what the difference is between the two pictures. Then you need to explain what this difference means – what is significant about the difference. Post your answers to this question challenge here!

Anonymous

The second set of vials contain collected gas! We are enjoying the journal posts. Your writing, video and photos are fantastic teaching tools!

Carol Scott

Congratulations, well done! Thanks very much for the feedback also, itis good to know.
Carol