List of top Science Questions

What changes are observed in the uterus: 
(i) Subsequent to the implantation of the zygote and 
(ii) If an egg does not get fertilized?

The minimum number of identical bulbs of rating 4V, 6W, that can work safely with desired brightness, when connected in series with a 240V mains supply is:
"Sex of a newborn baby in humans depends on the father, not the mother." Confirm this statement with the help of a flow chart.
Assertion (A): Kilowatt-hour (kWh) is the commercial unit of electrical energy.
Reason (R): \( 1\, \text{kWh} = 10^6\, \text{Joules} \)
What is the difference between menarche and menopause?
What are renewable and non-renewable sources?
Write the main differences between stars and planets.
Which of the following is the beam of light coming from the Sun?
Which of the following is the imaginary (virtual) image formed in a convex mirror?
Which of the following is the mirror formula?
How does a virtual image look like?
Which of the following is a magnifying glass?
The chemical formula of bleaching powder is
The ratio of HCl and HNO$_3$ in aqua regia is
What is the role of decomposers in the ecosystem?
What is the meaning of biological evolution?
Write the functions of liver.
Draw a neat labelled diagram of the respiratory organs of human being.
Explain the importance of pH in daily life.
Write the names of endocrine glands found in humans.
What are the benefits of a dam?
What is the importance of blood platelets?
Why does continuous running cause cramps to a person’s muscles?
Write the names of some excretory substances of plants.
Write four main characteristics of living beings.