Plate tectonics, Earthquakes, and Volcanoes

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

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 are underwater mountain ranges called?

• boundaries
• mid-ocean ridges
• rift valleys

Features formed at divergent boundaries are called?

• mountains
• earthquakes
• rift valleys

What is a weak spot in the crust where molten material, or magma, comes to the surface?

• volcano
• lava
• earthquakes

The place where old crust is pushed down into a trench is called what?

• subduction
• convection current
• deep-ocean trench