Choose "extinct" if the species is extinct and "endangered" if the species is endangered.

sixty years ago, as few as 20 whooping cranes were left on earth. now, to conservation efforts, there are more than 300 whooping cranes in the wild.

a. extinct

b. endangered

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!