Across
- 4. the boundry between two tectonic plates that are moving away from each other.
- 6. The man who investigated continental drift after finding fossils on opposite sides of oceans.
Down
- 1. The boundary where the tectonic plates are sliding past each other.
- 2. The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations.
- 3. of plate tectonics The theory that pieces of Earth's outer crust are in constant motion.
- 5. A supercontinent containing all of Earth's land that existed about 225 million years ago.