science test

The male reproductive system comprises of a pair of testes that are present in a thin-walled sac called the scrotum . The scrotum is contained within the abdominal cavity in the embryonic stage. Shortly before birth, they come down and remain outside throughout life. This is because t..

Chemical Reactions and Equations - A physical change is one in which the shape, size, appearance or state, of a substance may alter, but its chemical composition remains same.A change in which the composition of a substance is altered is called as chemical chang..

Lead nitrate is a white, crystalline solid. When heated, it starts decomposing with a crackling sound, producing a reddish brown gas called nitrogen dioxide, and a colourless gas, oxygen. A yellow residue of lead monoxide is left behind in the test tube. ..

Question 1 - Question: The science of classification is called 1. demography 2. taxonomy 3. biology 4. none of the above Answer:..

>it covers unequal distances in equal intervals of time or it covers equal distances in unequal intervals of time or it covers equal distances in equal intervals of time, but its direction is changing. (e) Acceleration Acceleration is defined as the rate of change of velocity Or Acceleration is the..

Question 1 - Question: Inertia is ________ 1. a property of matter 2. a type of force 3. the speed of an object 4. none of the above Answer:..

Question 1 - Question: SI unit of gravitational constant is __________. 1. N m 2 kg 2 2. N m 2 kg - 2 3. N m 2 s - 2 4. N mkg - 2 Answer:..

Question 1 - Question: 'Operation flood' is related to: 1. Flood and disaster management 2. White revolution (Milk production) 3. Green revolution 4. Brown revolution Answer:..

Question 1 - Question: Define an element. Answer: A pure substance that cannot be broken into two or more simpler substances by physical and chemical means is called an elemen..

Question 1 - Question: A substance has a definite volume but no definite shape. State whether this substance is a solid, liquid or a gas. Answer: The substance is a liquid. It has a definite volume but no definite shape and takes the shape of the container in which it is plac..