5.What is the speed of sound? Do you know 6. Does sound travel faster than light? Do you know 7. Are dogs color blind? Do you know 8. Why is the sky blue? Annie wants to know 9. Does that store accept credit cards? Do you know 10. Do insects have ears? The little girl wants to know 11. When will the next earthquake occur in California?No one knows 12. Will there be another earthquake in California this year?No one knows 13. Do animals have the same emotions as human beings? The little boy wants to know. 14. How do dolphins communicate with each other? Do scientists know 15. Can people communicate with dolphins? I want to find out 16. Have beings from outer space ever visited the earth? I wonder