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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
Define White Blood Corpuscles as Internal Defence Mechanism The white blood cells are probably the most important part of our immune system. You may recall reading about the wh
atomic spices definition?
Illustrate about the colour of the soil The colour of the soil gets influenced by the oxidation states of metal ions. Colours such as red, yellow and reddish brown are found u
The important physico-chemical properties of thiamin are as follows: a) Thiamin hydrochloride is a white, needle-shaped crystalline substance. b) It has a characteristic sm
all stars have a life cycle. the stages of stars that are bigger than the sun?
Moisture comes from home plants Place a cellophane bag over a leaf of some house plant or garden plant and close the end about the stem with a rubber band. Make an observation
what is sex
Steroids are of many types . These are given below: a) Sterols : Cholesterol, ergosterol. b) Bile acids : Glycocholic acid, taurocholic acid. c) Hormones : Testoste
Science and Technology during the Renaissance: This phase in the history of science was one of description and criticism. First came the exploration of ancient knowledge, mainly o
Water-mill in Golden era: The water-mills were also invented in the classical period. But they came to be widely used only in the Middle Ages. The wind-mills and water-mills
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