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The Solar Family:
Let us now take you on a journey across the universe. We begin from our planet EQrth. It is our home. The Earth is active, lush and fertile. It is a place of blue skies, vast *oceans, cool forests, a world full of life. Its surface is cloaked by an atmosphere in which 'we can breathe, and which keeps the Earth's temperature quite-constant. It spins or rotates on its axis and revolves around the Sun, completing one orbit in one year. The Earth is not alone. It has a companion on its travels, the Moon which orbits the Earth once in 27.33 days. But the Moon is airless, waterless and lifeless; it is a dead world. From the Moon, the Earth appears as a beautiful bluish-white planet. The Earth is not the only planet orbiting the Sun. There are eight other planets that orbit the Sun. The nine planets and their satellites togethkr with the Sun and many asteroids and comets make a family, the Solar System. The planets arc diverse in size, ranging from the giant Jupiter, efeven times the size of Earth, down to tiny Pluto, less than half the size of our planet. Each planet's distance from the Sun is different, Mercury being the nearest and Pluto, the farthest. They are all different from each other in many respects. But let's not dwell on the Solar
To study a hailstone When it hails, collect some of the hailstones. Cut them in half and view how the ice of the hailstone has been built up in layers. If you live in a region
To study the relation between volume and pressure of air Get a rubber bung or 'door stop' which just fits in a narrow glass jar or measuring cylinder. Attach it to the lowe
what is meaned by circular motion
Explain in detail about the Viruses Viruses are the ultramicroscopic parasites which always require a living h ost for their multiplication. Since they are much smaller than ba
A glacier that has neither advanced nor retreated for many years deposits:- end moraine
What are the Factors Affecting Soil Formation Parent materials formed due to weathering of rocks are transported from the place of their origin and re-deposited before they ar
which nutrient contains carbon, hydrogen, oxygen, nitrogen and sometimes sulphur and phosphorus?
how much bones are in human body?
Botany: In the Bronze and the Iron Ages, agriculture became the principal mode of production of man in all lands. It is, thus, not surprising that in India, botany and elementa
A wet and dry bulb hygrometer Get two inexpensive thermometers, and check them in warm water at dissimilar temperatures to see that they agree. Join the two thermometers to a
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