Practice Questions for Air And Water Science Class 4
Mountaineers carry oxygen while climbing mountains as the air _________.
Dams are built on big rivers to __________.
Germs spread through ___________.
Water is used for _________.
We can keep water clean by _________.
When we sit in a very crowded place, we start feeling hot and uneasy because of _______.
Topics in Class 4 Science: