I need help please, questions and information is on the listed files.

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

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions

What element is able to combine with itself and hydrogen to form large molecules ?