Explain what circadian rhythm is and how it can affect sleep

Activity 1.3.2 standard and metric measuring pltw

Can someone ! who is the intended audience for cortés—general description of tenochtitlán i need to fill out a hap-p chart pleaaasse

《riddle》 a man is stranded on an island covered in forest. one day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. the fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process. there are cliffs around the island so he can't jump off. how can the man survive the fire? (there are no buckets or any other means to put out the fire.)