Matter in Our Surroundings — Science STD 9 — Question

Bricksin a building and cells in the living organisms are:

Goldstein’s experiments which involved passing high voltage electricity through gases at very low pressure resulted in the discovery of:

1. Electron.
2. Proton.
3. Nucleus.
4. Neutron.

The botanical name of Egyptian clover is:

1. Crotalaria Juncea.
2. Lens culinaris.
3. Trifolium alexandrium.
4. Sesbania aculeate.

When we say 'sound travels in a medium' we mean:

One of the following represents the solution of solid in a solid. This one is:

On heating the solid _________?

A cell placed in hypotonic solution bursts up. It is:

1. Animal cell.
2. Bacterial cell.
3. Fungal cell.
4. Plant cell.

In Rutherford's gold foil experiment, most of the alpha particles:

Living cells were discovered by:

The evaporation of water increases under the following conditions: