Of the 5 systems on the spacecraft which one do you think is the most important? Why is it important?( At least 5 paragraph for full credit)

Which chemical equation is unbalanced? which chemical equation is unbalanced

Aristotle classified animals according to their a. habitat and mating behavior c. mating behavior and relatedness b. habitat and physical differences d. physical differences and mating behavior

Energy stored in the bonds that hold together the atoms and molecules of all substances is called a. kinetic energy. b. electrical energy. c. mechanical energy. d. chemical energy.