W a Science Teacher Wants to Provide Students with Experience

Multiple Choice

W A science teacher wants to provide students with experience in the skill of identifying and controlling variables. What would be the most appropriate activity?

A) Provide students with yo-yo's and ask them to list the factors that influence whether it will come back up after it is dropped, describe how they could tell which has the greatest effect, and then try each.
B) Provide students with mechanical tops and ask them to list the factors that influence how long it will spin, describe how they could tell which has the greatest effect, and then try each.
C) Provide students with a covered plastic container of cream and ask them to list the factors that influence how long it takes the cream to turn into butter when the container is shaken, describe how they could tell which has the greatest effect, and then try each.
D) Ask students to name the factors that influence the weather.
E) All of the above
F) None of the above