troposphere
The outer or topmost part of something is commonly referred to as the "surface" or "exterior." In various contexts, it can also be called the "outer layer" or "casing." This term describes the part that is visible and often serves as the boundary between the object and its environment.
The troposphere is the closest to the Earth and most dense atmospheric layer
The top of a rainbow is called the apex or the topmost point.
ionosphere
The exosphere is the atmospheric layer that is the furthest from Earth's surface. It extends from about 500 km to 10,000 km above sea level.
The topmost layer of soil is called the topsoil. It is rich in organic matter and nutrients, making it essential for plant growth.
Surface layer or topmost.
The topmost solid part of the Earth is called the crust. It is the outermost layer of the Earth's surface and is divided into oceanic and continental crust.
They form a layer called ozone layer which is found in the stratosphere.
The atmospheric layer below the mesosphere is called the stratosphere. It is located above the troposphere and below the mesosphere, and it contains the ozone layer which absorbs and scatters the sun's ultraviolet radiation.
Soil is the topmost layer of the Earth's crust.
chromsphere
The topmost layer of the atmosphere is known as the exosphere. It extends from about 500 kilometers (310 miles) above the Earth's surface and gradually transitions into outer space. The exosphere is composed of very low-density particles and no distinct boundary exists between it and space.
An increase in temperature with height in an atmospheric layer is called an inversion layer. This phenomenon is opposite to the normal decrease in temperature with increasing altitude in the Earth's atmosphere.
The topmost layer of soil is called the O horizon or organic matter layer. This layer is primarily composed of decaying plant and animal material, providing nutrients to support plant growth.
The Crust. the crust The crust!
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