Answer:
exothermic
Explanation:
boiling water releases heat and is therfor exothermic
condensing is the reverse reaction and is endothermic
Answer:
If the star has smaller mass than the Sun, it can fuse hydrogen into helium for at least a trillion years. The larger a star, the shorter its life because it fuses hydrogen into helium much more quickly. A star whose mass is more than 20 Suns will run out of hydrogen in only a few hundred million years.
Student C: A big, greedy dog stealing away a bone from a smaller dog
