My DS is in 6th grade and has to do an Earth Science Fair Project. The problem is every idea we come up with his Teacher says it's wrong . One idea was we were going to make a Tornado Chamber and the project was going to discuss, How are tornados formed. The next idea was Volcano's and the question we came up with was What layer of the earth does lava come from. Wrong again . DS said the teacher told him the question has to have a dependant and independant variable. So now I don't know what to do . Apparently earth science is not my strong point. So if anyone has any suggestions I'll take any help.