Dictionary guide words help users navigate by showing the first and last words on a page. For 'rock', guide words would be the nearest 'roc-' starting and ending words alphabetically. Learning about rock types and identification symbols is important for geological studies.
Guide words in a dictionary are located at the top of each page and serve to show the first and last words on that page, helping users navigate the dictionary more easily.
In the case of the word rock, the specific guide words would depend on the dictionary's edition and publisher; however, they would typically be words alphabetically surrounding 'rock'. The guide words could potentially be roentgenogram and rocketry if no other words starting with the letters 'roc' come between them in the dictionary.
You can learn more about the types of rocks such as sedimentary, igneous, and metamorphic rocks, and the standardized symbols used to describe them by referring to educational materials on rock identification before attempting to complete specific exercises such as sediment or metamorphic rock identification in a science class.