A chemical equation is that scientists use to describe a chemical reaction.

reactants or a product

Explanation:

A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products. ... A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

symbolic representation

Explanation: noun. a representation of a chemical reaction using symbols of the elements to indicate the amount of substance, usually in moles, of each reactant and product

satellites are frequently used to make observations of the orbit on earth

loss of sensation to pressure and touch

the dorsal column–medial lemniscus pathway (dcml) (also known as the posterior column-medial lemniscus pathway (pcml)) is a sensory pathway of the central nervous system that conveys sensations of fine touch, vibration, two-point discrimination, and proprioception (position) from the skin and joints.