The Word science Means to know, Knowledge, Digging.
The Knowledge which is gain through by observation and experiments is science.
Authenticate results by process of Hypothesis, research, observation & experiments is called science. If we call the past time people used to do their life activities according to their need of life, just like their way of living in the ecosystem. Of Course for their need of life they will be needed for the shelters, food, water, and so on… all these life needed things need science to achiever for life. However as compare to recent time we have various ways to study about these things, to find better results
Science not only lead us to know about a specific field, but that delve us into various field of life. Such as
1. Biology
2.Physics
3.Chemistry
4.Mathematics
The above fields will be explain respectively with complete explanation and Diagrams required according their topics.

1. Biology

Through out the history it being remain as a debate that how life existed on the living planet earth. Every scientist tried to give the solution to this question, after their results of research they gave their ideas about life. The cell which is the basic unit of life, However the word Biology is composed of two greek words. 1> Bios Means life. 2> Logos Means study. Study about life is called Biology.

If we keep glance upon the life, it’s very diverse into many creatures. According to the Islamic point of view there are about eighteen thousands creatures living in the universe.
The basic structure which we know about the living cell, which can not be seen by naked eye, is some how complex to understand.

Such as the cell membrane which is also called the permeable membrane, the cell wall which is found in the plants, DNA, RNA, the cytoplasm which is jelly like substance found inside the nucleus of a cell, the vacuoles inside the cell membrane which will be big and small in size according the living organism.

Well there are many more organelles inside of a microscopic cell organism to understand that.
Imagine if a microscopic cell has many organelles, which is also called unicellular, so it’s a very big challenge for human being to get knowledge about all those 18000 creatures living on the earth planet.

However but it’s not impossible everything is possible behind the true struggle of human being.
There are many branches of Biology, but here we will discus two main branches.

1. Zoology

Such branch deals with study of Animals.

2. Botany

Which deals with the study of Plants

What is Physics ?

The Natural phenomena is called physics. Here the word Natural phenomena means, the nature, how the nature happens , how it works. Suppose if a person through stone in a pond, the waves are producing, how and why it happens, the waves come into action, because of some external force on water and the relation of matter and energy. You will understand the relation between energy and matter in other definition of Physics below.
OR
Physics is the branch of science that deals with the study of matter and energy, their mutual relationship is called physics.
By mutual means there will be momentum or change of matter from one states of matter into another states of matter is due to the energy. Matter and Energy are interrelated among one another. The EduHQ (HeadQuarters of Education), will cover even a micro topic that may be related to results, tesp preparations, past papers or science subjects(Maths,Physics,Chemistry,Physics).

In this video it’s a very comprehensive explanation to understand the Physics, in term of Natural Phenomena. In the first step of starting you will see flying birds. Means momentum which is the product of mass and velocity. (p = m v ), where as birds are mass and flying is the change of displacement from one place into another which is called velocity. V = d/t, d is displacement and t is time. Second step in the video is sea where boats are which disturbing the medium which producing waves in the sea. The third step is rising on or setting on of sun, is also lead us to the natural phenomena which tell us about the day and night.