19 What is produced when plates slide against each other? a earthquake d. volcano b. mountain range e none of these c trench 20. The Alps and the Himalayas are formed as a result of the collision between a. two oceanic plates da continental plate and oceanic plate b. two continental plates e none of these cany two tectonic plates 21. According to the theory of Harry Hess, continents move because of a pull of gravity d wind b. rotation of Earth e none of these c. seafloor movement 22. The space between two tectonic plates is called a boundary d trench b fault e none of these c.rift 23. A boundary where plates move away from each other is called a divergent d. shear boundary b. convergent e none of these c transform 24. A deep crack in the Earth's surface is called a ridge d mountain b. fault e none of these c. plate 25. A stationary source of magma is called a a magma pool d. magma score b hotspot e none of these clava dome 26. An example of a transform/shear/sliding boundary is a volcano d fault b. mid-ocean ridge e. none of these c. deep-sea trench 27. Earthquakes occur at this boundary a asthenosphere b. convergent e none of these c. transform d. divergent