The cause of the Challenger space shuttle disaster was that the seals had not been tested at extremely low temperatures, so some of the seals failed. This is a problem with the step (perform tests on the prototype/testing) in the engineering design process.

10 songs

explanation:

i gave you 10 songs yay!

well no because those options are in a house

for those of you who searched "which list includes four types of animal-like protists? " and keep getting these results, the answer is c: flagellates, sarcodines, ciliates, parasites

i think cheerleading is definitely a form of art. or at least it should be! not everyone has what is takes/and or the determination to become a cheerleader. it takes practice and hard work, along with being able to master a move correctly, like dancing. dancing is a form of art, and i think cheerleading is too. not everyone can dance, just like not everyone can be a cheerleader.