Nautilus Expedition and Ocean Crust

Jessica from Nautilus Mission Control introduces the expedition to explore subduction volcanoes off Greece and Italy. She explains the formation of these volcanoes, starting with seawater seeping into the sea floor, leading to subduction zones where ocean crust is forced beneath tectonic plates. This process creates conditions for volcanic eruptions. The Nautilus Expedition aims to explore underwater volcanoes, collect samples, and analyze them to understand volcanic activity and provide warnings for future eruptions.

What is the primary focus of the Nautilus Expedition this season?

• Exploring the Amazon rainforest

• Studying the Great Barrier Reef

• Visiting subduction volcanoes near Greece and Italy

• Mapping the surface of Mars

How does seawater influence the ocean crust?

• It makes the crust dry and brittle

• It changes the composition, making it saturated

• It causes the crust to float

• It has no effect on the ocean crust

What is a subduction zone?

• A zone where the Earth's crust is stable

• An area where volcanic eruptions are impossible

• A place where two tectonic plates move apart

• A region where the ocean crust is forced beneath another plate

What happens to the ocean crust at high temperature and pressure?

• It releases a watery mix stored inside

• It becomes a solid rock

• It remains unchanged

• It evaporates completely

What forms when the watery mix from the ocean crust combines with the rock above?

• A large ocean trench

• A solid block of ice

• Small pockets of melted rock

• A new tectonic plate

What is the result when magma reaches the Earth's surface?

• A gentle breeze

• A powerful volcanic eruption

• A calm sea

• A new mountain range

What are the Nautilus Expedition's activities this season?

• Building underwater cities

• Cleaning the ocean floor

• Exploring underwater volcanoes and collecting samples

• Fishing for rare species

What types of samples are collected during the Nautilus Expedition?

• Meteorite samples

• Plant and animal samples

• Water, gas, and geologic samples

• Air and soil samples

What is one of the goals of the Nautilus research?

• To find new species of fish

• To provide warnings for future volcanic eruptions

• To create artificial islands

• To build new underwater habitats

Where can you follow the live exploration of the Nautilus?

• Nautilus live.org

• Nautilus mission.com

• Nautilus explore.net

• Nautilus journey.org