Do You Know?
It's the turn of water. Here are some questions about the importance of water to life on Earth.
1. When you are thirsty, you drink water. Not any water, but fresh water. Sea water has salt and cannot quench your thirst. What fraction of the Earth's water do you think is fresh water?
2. Do you think there is more water on Earth today than during the time of the dinosaurs?
3. Why is water called a universal solvent?
4. Coastal cities like Chennai and Mumbai do not have very cold winters or very hot summers. This is in contrast to interior India which can have sizzling summers and very cold winters. What is the property of water that causes this to happen?