* Properties:

* They are washable and it is wrinkle resistant and it is quite suitable in making dress material.

* It regains its shape automatically and remains crisp.

* They are light weight.

The mixture of rock particles and humus is known as soil. Many living organisms, such as earthworms, bacteria, plants roots survive in soil.

A base can be defined as a substance which can neutralize the acid by reacting with hydrogen ions. Some bases that are used in our daily life are Ammonia, Calcium hydroxide, Calcium carbonate, Calcium hypochlorite, Potassium hydroxide, Aluminum oxide, Hydrated iron oxides.

In angiosperms the sporophyll are organised into flowers and the seeds are produced inside fruits. They are sporophytic, in the form of herbs, shrubs, trees, climber creepers, etc. The smallest angiosperm is water plant Wolffia and tallest is Eucalyptus regnans (100m and above).

The characteristics of living things such as they can move by themselves, they need food, air and water, they can grow, they respond to changes around them, they respire, excrete and reproduce makes them the unique creatures of nature. Virus cannot considered as living because it is found in inactive state in environment. It is known as connecting link between living and non-living.

The mathematical expression for force of gravitation is,

When masses and distance between them is doubled, the new masses and distance between them is given by

M’=2M

m’=2m

d'=2d

The new gravitational force will be,

Vitamin ‘C’. chemical Name – Ascorbic Acid .

 The word Arthropoda means jointed legs, these are bilaterally symmetrical & segmented animals having jointed legs. E.g. butterfly, housefly, spider, Scorpio, etc. This is the largest phylum of animal kingdom.

 Seed germination is the process by which a plant sapling emerges from soil under some favorable condition.