7. the model of the universe that suggests that the sun is the center of the universe was first brought by
a. brahe.
b. ptolemy.
c. copernicus.
d. kepler.

C. Copernicus

Ptolemy was the one who proposed the geocentric theory (the Earth being the center of the universe), and Brahe and Kepler worked after Copernicus.

Alfred Wegner was the first person to propose the idea that all seven continents were all one supercontinent called "Pangea". Everyone considered his theory to be a joke until he found evidence to back up his theory. His evidence was the matching mountain ranges, fossils, certain species, and more over different continents. Also that all the seven continents fit together like puzzle pieces. I hope this helps! :)