What is it called when a substance changes from solid to gas, skipping the liquid stage? sublimation evaporation melting condensation

How does natural selection change thephenotypes within a population over time?

Which best describes what you will do in the reaching your academic potential course?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his 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