GENERAL SCIENCE
In our day to day life GENERAL SCIENCEplays a vital role, whether we understand or not. But we are applying. The aim of the inclusion such a topic in this is to make SCIENCE interesting and beneficial especially who have not studies science as a subject in their academic carriers and who are inhibited with an idea of 'difficult' 'cumbersome' 'highly academic in nature' etc. and beyond their comprehension.
What is science?
It Comes from Latin scientia, Means 'knowledge'. It further mean the systematic and sustained study of the world, including everything that be seen or detected in nature, man and society and the knowledge that grown out of such study. This is divided into two:
1. natural science- deals with nature or physical world subdivided into
- physical sciences- dealing with non-living matter (include astronomy, physics, chemistry, geology )
- biological or life sciences- deals with living matter ( include botany, zoology, physiology, medicine, genetics, evolution, ecology etc)
2. Social sciences include - deals with sociology, economics, political science, cultural anthropology, human geography
Natural Science
- This can be further divided into pure or applied.
Pure science is on studies to discover facts irrespective of any immediate usefulness or value( physics, physiology, botany, zoology).This is motivated by scientific curiosity alone. All such scientific development is ultimately based on such far-reaching and imaginative studies.
- Applied science refers to the attempts of scientists to solve scientific problems in order to discover facts of practical use to human beings. (eg. Engineering, medicine, forestry, animal husbandry)
Common classification
Few classify science as to:
- Exact - characterized by the possibility of exact measurement ( physics, chemistry).
- Descriptive- attempts to develop a method of description or classification that will permit precision of reference to the subject matter ( taxonomical botany,r zoology)
PHYSICAL SCIENCE
Two basic concepts of Physical science are 'matter' & 'energy'.
Matter is the substance composing everything perceptible to the senses. The distinguishing properties of matter are gravitation and inertia. Matter is anything that occupies space and has mass. All matter is composed of atoms .
Atoms are considered the basic building blocks of nature. Atoms themselves are composed of more fundamental components called elementary particles. Atoms may link together or in groups called molecules.,/p>
A molecule is an atom or a group of atoms which is capable of independent existence and has properties characteristic of the substance of which it is the unit.
Measurement plays an essential role in modern technology. Delicate machines cannot be built without precise measured components. Measurement is a form of comparison viz. length, properties, mass, duration of time, temperature, intensity of light, and so on. Every measurement compares a physical quantity to be measured with some fixed standard, known as the unit of measurement. A quantity is a measurable attribute of phenomena or matter. Units are grouped into systems suitable for use in the measurement of physical quantities. Common systems of measurement are:
- CGS - centimeters, gram, second
- FPS - Foot, pound, second ( British system)
- MKS- meter, kilogram, and second
Seven basic (SI) are:
| Quantity |
Unit |
Symbol |
| Length |
Metre |
m |
| Mass |
Kilogram |
Kg |
| Time |
Second |
s |
| Temperature |
Kelvin |
k |
| Amount of Substance |
mole |
mol |
| Electric Current |
ampere |
A |
| Luminous Intensity |
Candela |
cd |
Mass is the measurement of the quantity of matter that an object contains.