Question

Wegener believed continents moved, but he did not know how. Identify what needed to happen before Wegener's idea about moving continents could be proven.(1 point)
Responses

Wegener had to recheck his data and change his conclusions.
Wegener had to recheck his data and change his conclusions.

Advances in technology were needed to gather more evidence.
Advances in technology were needed to gather more evidence.

Scientists had to directly observe tectonic plate movement.
Scientists had to directly observe tectonic plate movement.

New information was needed on the composition of Earth's crust.

Answer 1

Advances in technology were needed to gather more evidence.

Reason: Wegener lacked a mechanism and the data (seafloor mapping, paleomagnetism, radiometric dating, etc.) that later technologies provided to demonstrate sea-floor spreading and plate tectonics.