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. Tangram is a popular Chinese puzzle that is fun to create It consists of 7 shapes 2 large triangles, 1 medium triangle, 2 little triangles, 1 parallogram and a square.