Pl help A teacher has been told that students like when they do activities that get the moving she asks her students what they think? Is it a observational study or a survey or a experiment?

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

The cluster of developing cells from conception until birth is called an

Which description provides the best objective summary of the article in the passage?