science year 1 scientists

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 little ..

An element is defined as a pure substance as it is made up of only one kind of atoms having the same atomic number. The smallest particle of an element is the atom, which has all the properties of that element. It cannot be further reduced to simpler substances by ordinary physical or ch..

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..

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'. All matter is assumed to be made up of particles that are very small, which may be a..

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 1 - Question: Why were the scientists not able to observe most of the cell organelles before 1940? Answer: Before 1940, scientists could view the cell only under a light microscope. The invention of the electron microscope in 1940 enabled the scientists..

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 increasing. With the discovery and study of more and more elements and their compounds, t..

The Atom - When scientists started exploring matter, they realised that matter can be divided into smaller and still smaller particles. What was the ultimate particle like? They discovered that the smallest particle of an element that maintains its chemical identity through all chemica..

Question 1 - 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 ann..

Question: The scientist who first carried out critical nuclear fission reactionis ______. 1. Otto Hahn 2. Enrico Fermi 3. Hans Bethe 4. Einstein Answer: ..