Question

7. State the composition of the Sial layer.
8. What does the Sima layer consist of? Where is it located?
9. Distinguish between the Sima and Sial layer.
10. Which are the two most abundant chemical elements in the Earth's crust?
11. Describe the mantle of the Earth,
12. State the properties of the core of the Earth.​

Answer 1

Here's your answer hope it helps
.
7) In Geology the term sial refers to the composition of the upper layer of the earth's crust namely Rock rich in silicates and aluminium minerals most layer of the crust is called sial consisting of silicate and Aluminium Si = silicate and Al = Aluminium.
.
8) In geology the Sima is the name of lower layer of the earth's crust player is made of rock rich in magnesium silicate minerals typically when the Sima comes to the surface it is Basalt some time it is called basalt layer of the crust.
.
9) Sial is composed of silicon and Aluminium it is upper layer which forms a discontinuous over cover the earth's crust and is entirely absent the ocean's floor. Seema is composed of silicon and magnesium the second layer below sial which forms the ocean base it is also called Oceanic crust.
.
10) Oxygen and silicon are the two most important abundant chemicals in the earth's crust.
.
11) metal is the mostly solid bulk of the earth's interior the Mantle lies between Earth's dense superheated core and it's thin out layer The crust mental is about 2900 km thick and makes up ab whopping 84% of Earth's total volume.
.
12) the inner core is a hot dense ball of mostly iron it has a radius about 1220 kilometre temperature in the inner core is about 5200°c the pressure is nearly 3.6 million atmosphere