Living with tectonic hazards - Gateway 1 (FULL QUESTIONS)

Question 1

Describe the core.

Answer 1

The core is mostly composed of iron and nickel. It is divided into a solid inner core that is 1200km thick, and a liquid outer core that is 2100km thick. Its temperature ranges between 3000°C and 5000°C.

Question 2

Describe the Mantle.

Answer 2

The mantle is mostly solid rock but flows under high temperature and pressure and is 2900km thick. It is divided into the upper and lower mantle. The upper mantle is a layer of solid rock and the asthenosphere is where the rocks are close to melting point and are easily deformed. The temperature between 800°C and 3000°C.

Question 3

Describe the crust.

Answer 3

The crust is the outermost layer on which we live. It is made of 2 types of crust, oceanic and continental crusts. The oceanic crust is found beneath oceans, is only 5-8km thick and is denser than the continental crust, while the continental crust is