Change of phase is a process whereby matter changes form (solid, liquid, gas).which one of the following constitutes a phase change?
*burning of wood
*digestion of food
*exhaling
*melting of candle wax
*photosynthesis

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

All vaccination should(n’t) be mandatory! 1.at least 5 sentences explaining 2.why? 3.in the end summarize the sentence

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