Earth’s crust – Everything you should know about

Earth crust

Earth’s crust meaning & definition

Earth's crust is Earth's hard outer layer. It is less than 1% of Earth's volume.

Earth's crust

Earth’s crust is made of

Different types of rocks: igneous, metamorphic, and sedimentary rocks.

What is Earth’s crust state of matter?

The Earth's crust is solid matter. Earth’s crust is roughly made of rocks (Both of oceanic and continental crusts). 

Some of Earth’s crust characteristics & infomation

The crust occupies less than 1% of Earth's volume and is divided into two distinctive types: oceanic and continental.

Earth’s crust thickness 

The oceanic crust is 5 km (3 mi) to 10 km (6 mi) thick and is composed primarily of basalt, diabase, and gabbro.

The continental crust is typically from 30 km (20 mi) to 50 km (30 mi) thick and is mostly composed of slightly less dense rocks than those of the oceanic crust. Some of these less dense rocks, such as granite, are common in the continental crust but rare to absent in the oceanic crust.

Earth’s crust temperature

The temperature of the Earth’s crust ranges considerably. 

At its outer edge, where it meets the atmosphere, the crust’s temperature is the same temperature as that of the air. So, it might be as hot as 35 °C in the desert and below freezing in Antarctica. On average, the surface of the Earth’s crust experiences temperatures of about 14°C.

However, the hottest temperature ever recorded was 70.7°C (159°F), which was taken in the Lut Desert of Iran as part of a global temperature survey conducted by scientists at NASA’s Earth Observatory. 

That’s quite the range already. But consider the fact that the majority of the Earth’s crust lies beneath the oceans. Far from the Sun, temperatures can reach as low as 0-3° C (32-37.5° F) where the water reaches the crust. 

If you dig down into the continental crust, temperatures will go up. The temperature of the crust typically in the range from about 200 °C (392 °F) to 400 °C (752 °F) at the boundary with the underlying mantle.

Namibian Desert

Earth’s crust mineral & element

The most abundant minerals in Earth's continental crust are feldspars, which make up about 41% of the crust by weight, followed by quartz at 12%, and pyroxenes at 11%.

Earth's  crust element's pie chart:

Earth's crust element

 

Some interesting Earth's crust facts

The crust is deepest in mountainous areas, up to 70km thickness

The continental and oceanic crusts are bonded to the mantle, forming a layer called the lithosphere. This layer is cool and rock solid.

Beneath the lithosphere there is a hotter part of the mantle that is always moving, this called the lithosphere and causes volcanoes and earthquakes. 

 

Your are a teacher and preparing for some lession about Earth's Crust, here is easy and simple Earth’s crust diagram worksheets & lession plan for teaching12

Source: Wikipedia.org, universetoday.com, quora.com