Atoms and Molecules — Science STD 9 — Question

In circular motion, the:

All living things including plants and animals are made up of:

Nucleus is not present in-

For a body which has turned by 300° in a circle of radius r,

Signs of eutrophication of water bodies include:

1. Reduced oxygen demand.
2. Rapid decomposition of organic matter.
3. Algal bloom.
4. Fluorosis.

The material which is added to water during purification process at the water works so as to disinfect it is:

The property/ properties which enable copper metal to be used for making electric wires is/ are:

A passenger in a moving train tosses a coin which falls behind him. This shows that the motion of train is:

1. Accelerated.
2. Uniform.
3. Retarded.
4. Along circular track.

Plants can be made disease-resistant by:

Most abundant animal tissue is: