Structure of the Earth
This metaphor was used in class to describe the structure of the Earth's crust.
What is the cracked egg metaphor?
The inner and outer core heat up molten rock at the base of the mantle, causing it to do this.
What is rise?
Oceanic plates moving away from each other form ridges at this type of plate boundary
What is Constructive?
This climatic hazard is the result of very little rain for a long period of time.
What is drought?
The point of origin of an earthquake below ground
What is a focus?
This layer of the Earth is made of molten rock, 3800°C, and the molten rock moves due to convection currents.
What is the mantle?
The molten rock in the mantle rises because it is this.
What is less dense?
Fold mountains are produced at this type of plate boundary.
What is a collision boundary?
This tectonic hazard may occur after an earthquake due to the displacement of water caused by the movement of an oceanic plate. A deadly one occured in Japan in 2011
What is a Tsunami?
A break in the Earth's crust caused by the movement or shifting of tectonic plates.
What is a fault (line)?
These are the two types of crust on the Earth's surface.
What are oceanic and continental?
As molten rock becomes denser near the crust, it pulls plates apart, forming this under the ocean's floor
What is a ridge?
Destructive plate boundaries have these two types of plates, one slipping underneath the other, causing volcanic eruptions and earthquakes.
What is 1 oceanic and 1 continental plate?
This factor impacting the severity of a hazard has to do with the period of time between hazards. For example, an 8.0 earthquake will occur once a year, but a magnitude 3 or 4 earthquake will happen several times every day.
What is frequency?
The point on the Earth’s surface directly above the focus of an earthquake
What is the epicenter?
Solid, 5,500 degrees Celsius.
What is the inner core?
What is the crust? (Plate of the Lithosphere)
The San Andreas Fault where plates slide past each other is this type of plate margin.
What is a conservative plate margin?
This hazard can be climatic or tectonic. It can be caused by rain or tectonic plate movement.
What is a landslide?
A vibration in the Earth’s crust generated by an earthquake or explosion.
What are seismic waves?
The outer core is liquid, made up of these two metals.
What are liquid iron and nickel?
This describes the cyclical process of molten rock rising and falling in the Mantle.
What is a mantle convection cell?
Volcanic eruptions do not occur at these two plate boundary types.
What are collission and conservative plate boundaries?
Depending on the region, this climatic hazard can also be called a Typhoon or a Cyclone.
What is a tropical storm or hurricane?
A seismometer measures these three things.
What are intensity, duration, and direction?