Definitions:
Speech is made up of the sounds within a language and is one of the main ways in which we communicate.
Language is a formal system of words and symbols through which we communicate. We might do this through speaking, listening, reading, writing, and viewing. Due to the nature of language, users have the ability to create and share infinite meanings.
Communication is a two-way process between participants where they exchange information, ideas, feelings, and create and share meaning. This may be done through different means such as spoken or written language, gestures, or visual aids.
People unconsciously use these skills throughout the day. An example, of how we do this can be explained by the simple task of ordering a meal in a restaurant. First, we use receptive language skills(reading) to read and view the menu and make a choice, then use expressive language (speech) to place our order. We might also use non-verbal communication by pointing to the item or the menu.
Additional communication skills are layered into this interaction such as eye contact, turn taking and social communication, (greetings and manners). Although this looks like a simple task, we are using a multitude of communication language, and speech skills!
Typically, children develop their basic foundation skills of speech, language and communication in their first 5 years, and continue to develop and refine their skills right up until adult years.
To read more about Speech Language and Communication in the Early Years click HERE. You will find an in-depth article by Tamra Bing, M.Sc. Speech-Language Pathology, University of British Columbia.