What is the Moon made of? Why is grass green? Why is the sea salty? Where do the stars go in the day? What are clouds made of? Why do we cry when we feel sad? Where do bees go in winter? Why do ships float? How does an airliner fly? What makes some drinks fizzy? Why do our ears pop when we fly in a plane? What is electricity and how is it made? How do fish breathe? How high is the sky? Why do we breathe faster when we run? Who invented the computer? Why do cakes rise when they are baked? What is the difference between a star and a planet? Why do you feel dizzy when you spin around? What causes winds to blow? If you have a question that you would like to see answered on Q-files, please send us an email to info@Q-files.com or use the contact us page.