Question 26
Complete the sentences on how volcanoes are formed. Choose words from the list.
**ash; boundaries; cone-shaped; crust; eruption; lava; magma; vent**
Volcanoes are openings in the Earth’s ____ through which molten rock and ____ come out. They occur at weak points in the Earth’s upper layer, most often at plate ____. Molten rock, also called ____, rises towards the surface. The pressure of the materials builds up until it bursts through as a volcanic ____. Magma that has erupted is called ____. Over time, this hardens and builds up around the ____, forming a ____ structure – the volcano.
**ash; boundaries; cone-shaped; crust; eruption; lava; magma; vent**
Volcanoes are openings in the Earth’s ____ through which molten rock and ____ come out. They occur at weak points in the Earth’s upper layer, most often at plate ____. Molten rock, also called ____, rises towards the surface. The pressure of the materials builds up until it bursts through as a volcanic ____. Magma that has erupted is called ____. Over time, this hardens and builds up around the ____, forming a ____ structure – the volcano.
