What barriers were broken by morse's telegraph?

What roles does climate change and natural resources play in global politics?

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.

When using the scientific method, what should be the first step? a.) gathering information on the problem. b.) stating the problem. c.) analyzing and interpreting data.