Lab- An Expedition to Sea floor

Front

What is sea-floor spreading?

Back

The process by which new ocean crust forms as magma rises to the surface at mid-ocean ridges, pushing older crust away.

Front

What are mid-ocean ridges?

Back

A chain of underwater mountains formed by tectonic plate movements and volcanic activity.

Front

What technology was used during WWII to map the seafloor?

Back

Sonar, which uses sound waves to detect objects underwater and create maps.

Front

What is the significance of mid-ocean ridges in plate tectonics?

Back

They are the sites where tectonic plates diverge, leading to the formation of new oceanic crust.

Front

Define continental drift.

Back

The gradual movement of continents across the Earth's surface through geological time.

Front

What is the relationship between sea-floor spreading and continental drift?

Back

Sea-floor spreading contributes to continental drift by creating new oceanic crust that pushes continents apart.

Front

What are tectonic plates?

Back

Large sections of the Earth's lithosphere that move and interact at their boundaries, causing geological activity.

Front

What is an example of a geological feature formed by sea-floor spreading?

Back

The Mid-Atlantic Ridge, where the Eurasian and North American plates are moving apart.

Front

What is sonar and how does it work?

Back

Sonar (Sound Navigation and Ranging) uses sound waves to detect and locate objects underwater.

Front

What is a rift?

Back

A rift is a linear zone where the Earth's crust is being pulled apart, often leading to the formation of new ocean basins.