We make a survey on eating and physical activity habits of the food, which will be answered by the students of our schools and one family member using GoogleForms on the Internet.In order  to ask the the right questions, we need to know what we want to verify. A questionnaire is usually used to verify several hypothesis.  A hypothesis could be f.e. "French people spent more time eating with their family" or  "Finns eat fish more frequently". You can write hypothesis on all four sections.