Volcanoes and Plate Tectonics

Today, what are the Earth's landmasses called?

• Pangea

• Oceans

• Continents

When magma reaches the surface, what is it called?

• lava
• explosive
• rocks

What is the shaking and trembling that results from movement of rock beneath Earth's surface?

• Volcanoes
• Earthquakes
• Plate tectonics

What is the crust that makes up the ocean floor called?

• oceanic crust
• crust
• continental crust

How do Geologists classify volcanic eruptions?

• Quiet or Explosive
• Dormant or Extinct
• Active or Non active

The movement of tectonics plates at a fault is a cause of what?

• convergent boundaries
• rift valleys
• Earthquakes

New seafloor is formed through the process of what?

• seafloor spreading
• continental drift
• divergent boundaries

Scientists think that the movement of Earth's tectonic plates are caused by convection currents, that are located in the _________?

• outer core
• inner core
• mantle

What is an area where material from deep within the mantle rises and then melts, forming magma?

• hot spot
• lithosphere
• transform boundary

What are underwater mountain ranges called?

• boundaries
• mid-ocean ridges
• rift valleys