measured how it changed with distances from the sample source. Thirdly, They measured how the
radioactivity were decayed by various shielding materials such as lead, acryl, aluminum, stainless steels.
After all of the hands-on activities, the questionnaire were given to the students. They answered all of them
and submitted to us in real life. The results were summarized and analyzed in this paper. All of these activities
were described and discussed in the following section.