| 1. True or false? Sound travels faster through water than air? | 
| 2. Water is made up of what two elements? | 
| 3. What is another name for a tidal wave? | 
| 4. True or false? The Indian Ocean is the biggest ocean on Earth. | 
| 5. The solid state of water is known as what? | 
| 6. Can the average human survive without water for a few days or a few weeks? | 
| 7. True or false? Pure water is tasteless. | 
| 8. Nimbus, cumulus and stratus are types of what? | 
| 9. True or false? Water is an example of a chemical element. | 
| 10. Does water cover more or less than 50% of the Earth’s surface? | 
| 11. True or false? Water boils at 100 degrees Celsius (212 degrees Fahrenheit). | 
| 12. When water is cooled, does it contract or expand? | 
| 13. Water freezes at what temperature? | 
| 14. True or false? Water is easy to compress. | 
| 15. What is the chemical formula of water? | 
| 16. The deepest point in all of the world’s oceans is named what? | 
| 17. True or false? The consumption of bottled water has risen significantly over the last few decades. | 
| 18. Pure water has a pH level of a around what number? | 
| 19. What is the longest river on Earth? | 
| 20. True or false? Ice sinks in water. |