Across
- 1. What type of volcano forms islands such as Hawaii in the middle of ocean plates? (hint: gently sloping volcanic landforms)
- 5. What process occurs when an oceanic plate sinks beneath a continental plate?
- 7. What is the deepest part of the ocean called?
- 10. Which part of the ocean floor lies between the continental shelf and the abyssal plain?
Down
- 2. What is the boundary called where two tectonic plates move apart and form new seafloor?
- 3. Which layer of the Earth is the hottest and produces magma?
- 4. What natural event occurs when undersea earthquakes displace large volumes of water?
- 6. What is the main rock type that makes up the oceanic crust?
- 8. Which layer of the Earth forms the ocean floor? (hint: crust)
- 9. What instrument is used to measure the depth of the ocean using sound waves?