Dynamic Crust Review

The image shows the Mid Atlantic Ridge. Which type of boundary occurs at this ridge where the ocean floor is spreading apart? 

• convergent
• divergent 
• transform fault

The innermost layer of the Earth is thought to be made of solid iron. What is the name of this layer?

• mantle
• asthenosphere
• inner core
• outer core

What causes tectonic plates to move?

• ocean currents
• convection currents in the mantle
• volcanoes
• the Coriolis Effect

The upper layer of the mantle is said to be thicker than the lower mantle, but not solid rock like crust. The tectonic plates rest on this layer and it is responsible for the movement of those plates. What is the name of this layer?

• crust
• asthenosphere
• outer core
• inner core

What instrument is used to detect the magnitude of earthquakes?

• barometer
• electrograph
• seismograph
• pictograph

The movement of Earth's crust along plate boundaries produces

• earthquakes
• volcanoes
• moutains
• All of these options. 

What is the main cause of most earthquakes?

• human activity
• hurricanes
• changes in temperature in Earth's mantle
• pressure deep within the Earth (from rocks crashing) that is being released

When molten rock reaches the Earth's surface, comes out and begins to cool, it is known as

• lava
• mantle
• magma
• crater

If the focus of an earthquake occurs beneath the sea floor, as the seismic waves travel through the ocean, they create a massive and destructive

• epicenter
• tsunami
• focus
• mountain

In the image, which type of boundary is shown? Hint: its located in the state of California. 

• divergent
• convergent
• transform fault