Topic starters are used by teachers to focus and engage their students at the beginning of a new topic.
These questions related to the topic to come, but not designed to assess any deep knowledge in the students. Rather the intention is to spark enthusiasm in the class and get them excited and interested in the new topic.
Present responses in a word cloud to your class to show them what the class already knows. This helps the class contextualize the topic in a way that their classmates do and engenders curiosity and engagement.