Researchers show high school students at Pine Tree High Scho…

Researchers show high school students at Pine Tree High School a video clip about the dangers of texting and driving and then track their texting and driving habits through an app on their phone for the next six months. Students at Oak Tree High School are not shown the video clip, but the researchers track their texting and driving habits through an app on their phone for the next six months as well. During those six months, there is no difference between the rate of texting and driving for the students at these two schools. This is an example of _______ research.

This past week, there was a disease passing through Charles’…

This past week, there was a disease passing through Charles’s workplace. Charles made sure he wore gloves all week. He never once touched a surface or another person without the gloves on. He also never put his hands to his mouth, eyes, or nose while wearing the gloves. And, just to be extra careful, Charles immediately washed his hands after he took the gloves off. Even with all of these precautions, Charles still came down with the disease. How is it possible that Charles got sick?