Science

Why is Hawaii different from most volcanoes?

It is a hot spot.

What happens to older oceanic crust as new rock is formed during seafloor spreading?

It is pushed away from the oceanic ridge.

Where are the most active volcanoes?

In The Ring of Fire near Japan

What is the process by which new oceanic crust is added?

Sea-floor spreading

If you discovered a new planet very much like Earth, where could you predict that planet would have the greatest concentration of volcanoes?

An area very similar to The Ring of Fire on earth.

At which plate boundary can you find volcanoes?

Convergent

What two events are common along tectonic plate boundaries?

Earthquakes and Volcanoes.

What is the difference between magma and lava?

Lava is on the surface but magma is under the surface.

Two of Earth's plates pressed together for many millions of years. What happened if they pressed together in a place where oceanic plate material meets continental plate material?

That would cause subduction

What happens during subduction?

The more dense and thinner plate (oceanic) subducts (sinks) under the less dense and thicker plate (continental)

What happens at a transform plate boundary?

The plates move alongside each other

What happens at a divergent plate boundary?

The plates move away from each other

All volcanoes are mountains, but not all mountains are volcanoes.

True

Earth's plates move along with the layer of slightly softened rock below them.

True

Plate tectonics is the scientific theory describing the large-scale motion of large plates and the movements of a number of smaller plates of the Earth's surface.

True

Which Earth layer contains convection currents that are believed to be responsible for the movement of Earth's tectonic plates?

the mantle