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The atmosphere.
The ozone layer
This could be the magnetosphere, the atmosphere, or the biosphere, depending on your needed reference frame.
The water sphere of earth is the HYDROSPHERE.
the equator is the imaginary line around the earth.
The atmosphere.
The imaginary line around which the earth turns is its axis.
The Ozone Layer
It is called the atmosphere.
The ozone layer
The Celestial Globe (or sphere) is an imaginary sphere around our planet, earth. All objects in the sky and space, such as satellites, can be thought inside this invisible sphere.
This could be the magnetosphere, the atmosphere, or the biosphere, depending on your needed reference frame.
Earth spins around its axis(or imaginary line from the north pole to the south pole) by gravity from earth itself and the surrounding planets.
celestial sphere A+
celestial sphere A+
This imaginary line is called the great circle. A great circle is the shortest distance between two point on a sphere. On a flat map the great circle route takes the shape of the arc of a circle due to the projection method used to fit the path on the earth's sphere to a flat surface.
In the globe it is called the axis. In a sphere it is called the diameter.