Question

Write 3 layers of earth and characteristic

Answer 1

Answer:

Explanation:

Earth can be divided into three main layers: the core, the mantle and the crust. Each of these layers can be further divided into two parts: the inner and outer core, the upper and lower mantle and the continental and oceanic crust. Both the inner and outer core are made up of mostly iron and a little bit of nickel.

The Crust :

• The outermost layer

• Ranging from 5-100 km thick

• Thinnest layer of Earth – less than 1%

of the Earth’s mass

• Least Dense

• Temperature ranges from 20°C to

870°C.

• Made of two layers.

• Top layer is primarily granite. Bottom

layer is primarily basalt.

• Two types of crust: Continental and

Oceanic.

• Both layers found under continents.

• Only basalt layer under the oceans.

Mantle :

• The layer of Earth beneath the crust

is called the mantle.

• Approximately 67% of Earth’s mass

is found in this layer.

• The top boundary, the MOHO, is

made up of solid rock. In the center

of the mantle, the rock is viscous..it

flows like syrup.

• Scientists have been able to

examine the molten rock from

active ocean volcanoes to gather

most information about this layer.

• It is made up mostly of iron and

magnesium.

• Temperatures range from 870°C to

2200°C.

Core:

• The core extends from the bottom of

the mantle to the center of the Earth.

• Approximately 33% of the Earth’s

mass.

• This layer is divided into two parts:

the liquid outer core and the solid

inner core.  

• The diameter of Mars is almost the

same as the diameter of the Earth’s

core.

• The core is responsible for the

Earth’s magnetic field.

• Temperatures range from 2200°C to

5000°C.