public library of science scientists

Use less and do not waste. Resources saved are resources earned for your community. Do not waste water - switch of running and leaky taps, bathe with a bucket don't shower; Don't waste energy - turn out the lights and fans when you are not in a room, take public transport or walk short d..

Intensive investigation by scientists over the years led to the development of a mental model (the minuscule particles couldn't be actually seen at that time) known as 'dynamic particle model..

Introduction - At the turn of the nineteenth century, about 30 elements were known. 50 years later by the 1850s, scientists had discovered sixty three chemical elements and the numbers kept increasin..

Question: A scientist in CDRI, Lucknow developed an anti-cerebral malarial drug called A from a plant B. Identify A and B. Answer: A : Arteether B : Artemisia annu..

Eatables should be kept covered to prevent contamination through dust and flies Fruits and vegetables should be well washed with potassium permanganate, before use Water should be boiled before drinking. Filtered water and mineral water are also safe Proper sanitation and toilet faciliti..

Take a look at your surroundings. You may find a pencil, a book, an apple, a table or a chair. Can you feel the air blowing? These are different forms of matter. One or more of our senses can recognize these. These objects possess mass, occupy space and have different shapes, sizes and colours. Al..

Question: The scientist who cut off the tails of mice of successive generations to prove Lamarck's theory wrong was _____. 1. Weismann 2. Haeckel 3. Darwin 4. Wallace Answer: ..

The Structure of the Atom Scientific investigation on the structure of atom and its subatomic particles is an area where still absorbs scientists. In the process, they have discovered many more new subatomic particles, for example positron, meson, quarks etc. We will however confine o..

Structure of the Atom - The Structure of the Atom Scientific investigation on the structure of atom and its subatomic particles is an area where still absorbs scientists. In the process, they have discovered many more new subatomic particles, for example positron, meson, quarks etc. We wi..

Introduction - The cells that make up our body are so small that you could fit over 200 of them on the full stop at the end of this sentence Before we plunge into the chapter, here are some interesting facts about cells. Read on... The word cell is derived from the Latin word cellula which means a ..