Sound — Science STD 9 — Question

1. Soil.
2. Sea water.
3. Air.
4. Coal.
5. Soda water.

India has ______ Major river basins and ______ composite river basins that form the surface water resource.

Name two other sea food items except fish.

The practice of growing of two crops simultaneously on the same piece of land is called _______.

What percent of moisture should be present in the food grains at the time of storage?

Name the external factor which is responsible for ringworm disease.