ACTIVITY All About Elements
1. Collect fifteen household materials.
2. Make sure that the food labels and ingredients of the products are still visible.
3. Complete the table below.
Kind of Product
Name of Product
Element/s It Contain/s

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

answer; a cost benefit analysis;

answer; validity;