The Fundamental Unit of Life — Science STD 9 — Question

Greenhouse is related to:

1. Global warming.
2. Terrace gardening.
3. Kitchen garden.
4. Increase growth of algae.

Which mathematical relation of energy of a stone of mass m falling freely from height h remains conserved at every point in its downward motion?

Jaundice is a disease of:

1. kidney.
2. Liver.
3. Pancreas.
4. Duodenum.

A sprinter is running along the circumference of a big sports stadium with constant speed Which of following do you think is changing in this case?

1. Magnitude of acceleration being produced.
2. Distance covered by the sprinter per second.
3. Direction in which the sprinter is running.
4. Entripetal force acting on the sprit.

Simple tissues are these:

The atoms of which of the following pair of elements are most likely to exist in free state?

1. Hydrogen and helium.
2. Argon and carbon.
3. Neon and nitrogen.
4. Helium and neon.

Simple epithelium is a tissue, which form the outer protective layer of the skin of the animal body, is composed of cells which are:

The number of valence electrons in a sulphide ion, S^2-, is:

1. 16
2. 10
3. 9
4. 8

The sound waves travel fastest:

1. In solids.
2. In liquids.
3. In gases.
4. In vacuum.

The device which converts mechanical energy into energy which runs our microwave oven is: