Matching Pairs Interm 12-Unit 5: Survival Online version Activity 2 by MD1 UTDA 1 When there is an... 2 When an earthquake happens... 3 An eruption occurs when... 4 When mud, rock and stones slide down a hill... 5 A Hurricane is a... avalanche, a lot of snow slides down a mountain. a volcano makes an explosion of rock, gas and dust. large storm that begins over the northern Atlantic Ocean. is called a landslide. the ground shakes and moves.