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Night Sky:
When you look up at the sky on a clear night, what do you-see? Most of it is dotted with twinkling stars. You may see the moon or Venus as a bright point or Mars as a reddish one. Venus is sometimes seen in the evening just after sunset and, at other times, in the morning before sunrise. Except for the planets, all sthcr points of light are stars. From our planet Earth, on a really clear, dark night, we aan see .about 6,000 stars. Stars and Constellations The night sky is interesting. The stars seem to fall into certain patterns. You must have seen the Saptarishi, also known as the Big Dipper or the Plough. It is a part of a bigger group of stars called the Great Bear or the Ursa Major which is seen in the northern sky. We can see many different star patterns like the Hunters, the Lion, the Dog, the Balance etc. These pictures are not there really in the sky. Our imagination has put them there. The early star gazers and the ancient astronomers traced out these star patterms and named them after gods and heroes, objccts or creatures which these groups of sqrs resembled in their imagination.
Fractures : It is not our intention to introduce you to many types of fractures that can occur or all the ways a first aider might deal with them. The essential thing is that you
What is the earth crust made of? Ans) The overall composition of the Earth crust is as follows: Silicon 27.7% Oxygen 46.6% Iron 5.0% Aluminum 8.1% All other elem
Model water wheels A meat skewer or a knitting needle can be used as an axle. An old typewriter ribbon- spool or a sticking plaster reel is useful as a basis for these improvis
Archaeological Evidence: The study of human antiquities, especially of prehistoric period is known as archaeology. The biological and cultural evolution of man proceeded side
Question: a) How does temperature changes in the stratosphere? Give a physical explanation and illustrate your answer using a diagram. b) Write a short note on ozone in the
what is the environment?
An aneroid barometer The corrugated rubber tube from a gas mask, or a cycle grip, can be used to make a model aneroid barometer. No huge accuracy is to be expected due to the m
why say f=ma
structure and function of respiratory organs in arthropoda with diagram
What minerals attract lightning? Ans) Big structures and things that are metal attract lightning, also trees do. In fact, anything that is metallic having mineral may seem
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