What two instruments made navigation much easier in the 1900s?

global positioning satellite (gps) and two-way radio
the chronometer and the astrolab
the cross-staff and the compass.
the chronometer and the compass.

Which sentence is an example of a strong conclusion to an autobiography? a. i stayed after school three days in a row to practice onstage in the auditorium. b. i knew i would have to practice all week to memorize my dance for the recital. c. after the recital was over, i knew practicing was worth it, and i was looking forward to my next big challenge. d. on opening night, i danced in front of a packed auditorium.

In the water cycle , when does water undergo a chemical change

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.