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CBSE->Std 9 Questions

Total Questions 1962
why does the sun rise in the east and set in the west?
explain, how a charged cloud passing over a tall building causes lightning?
Pancreas act as a dual function. why?
what are the properties of sound?
a conversation between two friends solving the pollution of the school ground.
why we can see only one side of the moon?
HOW DOES LIGHTNING TAKES PLACE WHEN TWO CHARGED CLOUDS COME CLOSER?
WHY IS INCOMPLETE COMBUSTION MORE HARMFUL TO HUMAN BEINGS?
what type of fertilization takes place in spider?
give reasons as to why: parts of rajasthan, gujarat and leeward side of the western ghats are drought -prone
give reasons as to why: the delta region of easten coast is frequently struck by cyclones
how do jet streams affect indian climate?
give reason as to why : seasonal reversal of wind direction takes place over the indian sub continent
give reason as to why : bulk of rain fall in India is concentrated over a few days
what are isobars?
what is echo ranging?
define echo ranging?
Why is an independent and powerful judiciary considered essential for democracies?
A certain sum of money becomes three times of itself in 20 years at simple interest. In how many years does it become double of itself at the same rate of simple interest?
what is sonic boom