Final answer:
By the age of 5, children can speak about 2,000 words, have a rapidly growing vocabulary, and are able to engage in conversations, define words, and recognize humor in language.
Step-by-step explanation:
A 5-year-old child is typically expected to speak around 2,000 words. At this age, children undergo significant cognitive and psychosocial development. Their vocabulary grows rapidly, often referred to as the "vocabulary spurt", where they might learn 10-20 new words per week. By the age of 5, children not only know a vast array of words but also can speak in full sentences, ask about the meaning of words, and define them by their use. For instance, they understand the concept of a bed being for sleep. Their language skills also include recognizing letters and words, engaging in conversations, and enjoying humor.