An Earthquake is a sudden tremor or movement of the earth's crust, which originates naturally at or below the surface.The word natural is important here, since it excludes shock waves caused by French nuclear tests, man made explosions and landslides caused by building work. There are two main causes of earthquakes.n Earthquake is a sudden tremor or movement of the earth's crust, which originates naturally at or below the surface.
Definition of TANGRAM. : a Chinese puzzle made by cutting a square of thin material into five triangles, a square, and a rhomboid which are capable of being recombined in many different figures.See tangram defined for kids. ADVERTISEMENT.efinition of TANGRAM. : a Chinese puzzle made by cutting a square of thin material into five triangles, a square, and a rhomboid which are capable of being recombined in many different figures. See tangram defined for kids. ADVERTISEMENT.
Not only are tangrams a good way for children to explore mathematics, children actullay find them intersting and like to invent their very own designs. This is very important bacause if the child is interested then half of the battle of reaching them is accomplished.ot only are tangrams a good way for children to explore mathematics, children actullay find them intersting and like to invent their very own designs. This is very important bacause if the child is interested then half of the battle of reaching them is accomplished.