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.
  Answer   Tangrams are ancient Chinese puzzle patterns that consist of seven pieces. The seven pieces include: a small square, a parallelogram, two small congruent â¦ triangles, one medium triangle, and two large congruent triangles. The origin of Tangram puzzles is debatable.ou are allowed to rotate the Tangrams as necessary.     Tangrams test your spatial ability with the different size of the pieces. For example, there are triangles of various sizes to choose from. It is important to place them in the correct position and at the correct angle to produce the picture.