Layers of Earth

Oceanic Crust

What crust is younger?

Continental Crust

What crust is older?

71%

What percent is the Continental Crust in terms of volume or Earth’s surface?

21%

What percent is the Oceanic Crust in terms of volume of Earth’s surface?

3.8-4 billion years old

How old is the Continental Crust? “

less than 200million years old

How old is the Oceanic Crust?

25-70km

How thick is the Continental Crust?

7-10 km

how thick is the Oceanic Crust?

Continental Crust

Under what crust/plate is the Granite rock?

Basalt

What igneous rock is denser?

less compact

What does less dense means?

Oceanic crust

Under what crust/plates is the basalt rock?

Compact

What does dense means?

Crust

What is the uppermost part of the mantle?

Lithosphere

It is a rigid layer that can break under stress.

Tectonic plates

What are the large and small broken lithosphere?

Asthenosphere

It can deform and reshape as a result of the hot, molten mantle. It is below the lithosphere.

Convection Currents

What does the circulation called when asthenosphere deformed?

Convection current

It is generated when hot lower mantle moves upward, displacing the cooler materials from the upper mantle which then moves downward.

Continental Crust

Composed of aluminum silicates.

Oceanic Crust

Its composed of magnesium silicates

nickel

What does Ni means?

Iron

What does Fe means?

Continental crust

Lighter crust/plates

Oceanic Crust

Heavier crust or plates

Mantle

It is a semisolid, rocky and very hot layer below the crust.

2900km

What is the thickness of the mantle?

Ferro-Magnessium silicate rock

The mantle is composed of?

Inner core and outer core

What are the two types of core?

Outer core

What is the liquid core?it is also the only layer of Earth that is liquid.

Inner core

What is the solid core?

molten nickel and iron

What does the outer core made of?

2270km

How thick is the outer core?

3700°C to 4300°C

What is the temperature of outer core?

Inner core

It has a diameter of about 1220 km

1220km

What is the diameter of inner core?

Solid iron

Inner core is composed of?

60000°C

What is the temperature of the inner core?

Mohorovicic discontinuity

It marks the boundary between the crust and upper mantle.

Moho

What does the mohorovicic discontinuity commonly called?

Andrija Mohorovicic

Who was the Croatian seismologist who recognized the mohorovicic discontinuity?

Gutenberg discontiuity

Marks the boundary between lower mantle and outer core

Lehman discontinuity

Located between liquid outer core and solid inner core

Inge Lehmann

Who discovered the inner core in 1936?

Beno Gutenberg

Who made a substantial contributions about Earth’s interior in 1913?

Granite

What igneous rock is less denser?