There are five layers of earth.

Primary rock is an early term in geology that refers to crystalline rock formed first in geologic time, containing no organic remains, such as granite, gneiss and schist as well as igneous and magnetic formations from all ages.

Secondary rocks - Rocks composed of particles derived from the erosion or weathering of preexisting rocks, such as residual, chemical, or organic rocks formed of detrital, precipitated, or organically accumulated materials; specif., clastic sedimentary rocks.

Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at the Earth's surface, followed by cementation.

 Non-sedimentary rocks are created when water evaporates or from the. remains of plants and animals

Summer - the warmest season of the year, in the northern hemisphere from June to August and in the southern hemisphere from December to February.

Winter - the coldest season of the year between autumn and spring

Autumn -  the season of the year that comes between summer and winter

Spring - the season of the year between winter and summer when the weather gets warmer and plants begin to grow

Earth is not round

Lava - a hot liquid rock that comes out of a mountain with an opening in the top (volcano) Igneous rocks - the hot liquid rock that comes out of a mountain with an opening in the top (volcano) Magma - very hot liquid rock found below the earth’s surface Meteoroids - a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere.

Sediment - a thick substance that forms at the bottom of a liquid

Rotation - a circular movement of an object around a center of rotation.

Revolution -  the action by a celestial body of going round in an orbit or elliptical

Horizontal - going from side to side, not up and down; flat or level

Synonyms for "Revolution"spinrotationuprisingrevoltrebellionturnroundlapcircuitcirclecoupmutiny

The height of 'Mount Everest' above sea level.

Casting is a manufacturing process in which a liquid material is usually poured into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify.

Weather - to change or make something change in appearance because of the effect of the sun, air or wind

Acclimatization is the process in which an individual organism adjusts to a change in its environment (such as a change in altitude, temperature, humidity, photoperiod, or pH), allowing it to maintain performance across a range of environmental conditions.

The radius of the earth in miles.