Scientists use the emission spectra of elements to detect a) explosives in luggage. b) cracks in support structures, like bridges. c) the possibility of an earthquake occurrence. d) elements in clouds of gas and dust in deep space

Which of the following is not a true statement about dwarf planets? a the kuiper belt contains comets, asteroids, and dwarf planets. b ceres is a dwarf planet located in the kuiper belt. c the largest known dwarf planet in the solar system is named eris.