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Explain Immune System
The animals and the human beings are forced to encounter many dangerous microbe in their day-to-day life, through water, air and food. Inside our body there is a amazing protective mechanism called the immune system. It works silently inside our body for the entire life but we probably know almost nothing about it. What role doe it play in our body? The immune system is designed to protect us from the million of the microbes, toxins, parasites.
Floating a needle on water Thoroughly dry a steel needle. Place it on the tines of a dinner fork and gently smash the surface of the water in a dish with the fork. If you are c
Density of the Earth's Layers Density and gravity caused the proto-Earth to cool and settle into four distinct layers. The four layers are, from top to bottom: the crust, the
all stars have a life cycle. the stages of stars that are bigger than the sun?
Explain the Igneous rocks form? Igneous rocks form from the crystallization of magma. There are two main kinds of igneous rocks: intrusive and extrusive Molten rock within t
Science in the post-renaissance period (1540- 1760): We have seen above that improved techniques as well as growing trade had led to great voyages to many lands. These were
Name of the metamorphic rock: gneiss
describe the factors which decide the broad area of scientific activity
Human Evolution: Charles Darwin in the 'Origin of Species' gave a lilechanism for the evolution of plants and animals in general, even though he had speculated about the o
To show that liquids exert pressure Connect two 15 cm lengths of glass tubing or two transparent plastic soda straws with a short length of rubber tubing and attach them to an
Explain Skin Secretions - External Defence Mechanism The oil and sweat secreted by sebaceous and soporiferous glands contains fatty and lactic acids, which makes the surface of
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