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.
Another reason why tangrams are important and intersting is that Tangrams have both geometric and artistic features. Children gain geometric insights as they discover and discuss the relationships among the tangram pieces and what they can represent (Bohning, G., et al., 1997, p. 83-87).angrams present a new, interesting, hands-on way to deal with topics that most often are or can be quite boring and meaningless. Not only are tangrams a great way to help make geometry, fractions, etc. engaging, they also help make it authentic.