1. A method performed by an image search system of one or more computers, the method comprising: receiving a query from a client device; providing one or more image search results to the client device, each of the one or more image search results identifying a corresponding image resource and each of the one or more image search results including an image representation of the corresponding image resource; providing related queries to the client device, the related queries having been determined to be related to the query, wherein each of the related queries includes a respective preview image, each preview image representing an image search result responsive to the related query, and wherein each of the related queries includes a respective dismissal element displayed for each query, each dismissal element selectable by a user; and providing instructions to the client device that when executed by the client device cause the client device to perform operations comprising: displaying the one or more image search results responsive to the query; for each of the related queries, displaying the related query with the respective preview image included with the related query and a respective dismissal element for the related query and that is selectable by a user; determining that a user has selected a first respective dismissal element for a first related query of the related queries; and in response to determining that the user has selected the first respective dismissal element, ceasing to display the first related query, the first respective dismissal element, and the respective preview image.