Diversity In Living Organisms — Science STD 9 — Question

Define one newton force.

The process of supplying _______ to crops in the fields by means of canals, reservoirs, wells, river valley systems and river lift systems is known as _______.

What is the maximum number of electrons an M shell of the atom can accommodate?

Name the radioactive isotope which is used in the treatment of cancer.

Explain how, the smell of food being cooked in the kitchen reaches us even from a considerable distance.

State whether speed is a scalar or a vector quantity. Give reason for your choice.

Name the process associated with the following:
A potassium permanganate crystal is in a beaker and water is poured into the beaker with stirring.

A girl is cooking some food in the kitchen. The smell of food being cooked soon reaches her brother’s room. Explain how the smell could have reached her brother’s room.