What are the layers of the Earth?
Q: What are the layers of the Earth?
A: The structure of the Earth is divided into four layers. These include an outer solid layer called the crust, a highly viscous layer called the mantle, a liquid layer that is the outer part of the core called the outer core, and a solid center called the inner core.
Q: How is the shape of Earth described?
A: The shape of Earth is described as an oblate spheroid, which means it is slightly flattened at the poles and bulging at the equator.
Q: What was discovered between Earth's crust and mantle?
A: Between Earth's crust and mantle was discovered a boundary called Moho. This discovery showed major changes in structure as one goes deeper.
Q: What elements make up most of Earth's crust?
A: Most of Earth's crust is made up mostly by lighter elements such as silicon, oxygen, aluminium. Because of this it is known as sial (silicon = Si; aluminium = Al) or felsic.
Q: What makes up most of Earth's mantle?
A: Most ofEarth's mantle consists mostly oxygen, silicon and heavier element magnesium which makes it known as sima (Si for silicon + ma for magnesium) or mafic.
Q:What type rock forms uppermost part of mantle ?
A:The uppermost part of mantle forms base for crust and its made from heavy rock peridotite . It together with continental & oceanic plates form lithosphere .
Q:What are characteristics & compositionof earth’s core ? A:Earth’s core consists mainly iron & nickel , its temperature being around 5000-6000 °C , similar to photosphere on sun . Its composition might be changing mixture liquid & crystals due to high pressure & temperature .
