Who proposed the explanation for changing continental positions in the early twentieth century?

Which statement summarizes Wegener's continental drift hypothesis?

Which name belongs to the supercontinent shown in this reconstruction?

Approximately when did Pangaea begin breaking apart?

A tectonic plate is a rigid section of which Earth layer?

Which description best identifies a craton?

What major scientific objection was raised against Wegener's continental drift proposal?

Which comparison would make fossils like this useful evidence for continental drift?

On which pair of continents have Mesosaurus remains been found?

Mesosaurus fossils occur in similarly aged rocks in Africa and South America. Given its freshwater habitat, which explanation best accounts for this distribution?

Which outlines generally provide the better jigsaw fit when testing former continental connections?

Which rock comparison would most strongly support a former connection between two continents?

Which present-day regions contain fragments of the Caledonian mountain belt used as evidence for continental drift?

Which observation provides evidence about past climate when reconstructing continental positions?

Ancient glacial deposits occur on several southern landmasses. What former arrangement helps explain their distribution?

Which process is represented by this ocean-floor cross-section?

Rock on both sides of a mid-ocean ridge shows matching bands of normal and reversed magnetic polarity. What explains this pattern?

At an underwater spreading center, how does cooling molten material affect the ocean floor?

How does a tectonic plate differ from a continent?

How does plate tectonics explain continental movement?