Mrs. Chandler's Science Class

Middle School Science Dictionary and Encyclopedia

A C D E H M N O P Q R S
Pa Pe Pp Pr

pathogenic

  1. causing or capable of causing disease or illness

period

  1. a row of chemical elements

prediction

  1. It is a guess of what might happen based on observation.

procedures

  1. a series of actions conducted in a certain order or manner

proton

  1. A proton is a subatomic particle with a mass defined as 1 and a charge of +1 (positive charge).