"I am going to show you some true facts about several different science topics. It is important to remember that even though some of the facts may seem surprising, they are all true. Your task is to answer out loud a question about each sentence. The question will always be the same and is: 'Why is that fact true?' It is very important that you try and answer why each fact is true. In order to help you come up with an answer, you might want to think about things you have already learned in school, read about, and your everyday experiences."
"It is very important that you work together to answer why each fact is true. You should listen very carefully to your partner's answers as they may say something that you did not know or think about. It is okay to help each other and to use your partner's answers."