To help students learn the appropriate text structures, text features, and language of informative/explanatory writing, teachers might begin with Talk-alouds. Below you will see two 2nd grade examples that focuses on the use of diagrams. These are a paired set of a Reading Talk-aloud and a Writing Talk-aloud.
functional group. n. An atom or group of atoms, such as a carboxyl group, in an organic compound that defines the structure of a family of compounds and determines the properties of the family. functional group. n.
Functional groups are groups of atoms in hydrocarbons which are responsible for their chemical properties. The types of functional groups include halocarbons, alcohols, ethers, aminoss, aldehydes, ketones, carboxyllic acids and esters. These functional groups are bound to a hydrocarbon structure denoted R.