Name any four activities where we use water.

Name any four activities where we use water and mention the activity that uses the most amount of water?

Name any four activities where we use water and in which one uses the least amount of water?

Name any four activities where we use water. How can we reduce the usage of water in all these activities?

What is atmosphere? Why do we need air?

Why do we feel hot and sticky on a rainy day?

Why do mountaineers carry oxygen cylinders with them while climbing on high mountains?

List four uses of water.