Sort the questions based on whether they are better answered by an observational study or a controlled experiment. How effective is a new
How does the daytime
Which is a better absorber

how effective is a new toothpaste in reducing cavities?

An aircraft performs a maneuver called an "aileron roll." during this maneuver, the plane turns like a screw as it maintains a straight flight path, which sets the wings in circular motion. if it takes it 35 s to complete the circle and the wingspan of the plane is 11 m, what is the acceleration of the wing tip

Phase changes are chemical changes. true or false

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.