Page 29 - Resources
P. 29
Lessons 2-5
Isaiah 40:12b ‘Who has held the dust of the earth in a basket, or weighed
the mountains on the scales and the hills in a balance?’
Read the following information about mountains then complete the tasks.
Block mountains are created when a great amount of pressure is
exerted on a part of the earth’s crust so that faults form in the
crust. The uplifted blocks are block mountains. Around the faults,
or cracks, large sections of rock have lifted or fallen.
An example of a block mountain range is the Ruwenzori range in Uganda.
The fallen sections can form extensive rift valley systems. Examples can be
seen in East Africa and the Rhine valley.
Volcanic mountains are formed by volcanoes which are holes or vents in the
earth’s crust. Gases and/or liquid rock known as magma or ash seep out or explode onto the
earth’s surface. Sometimes there are rivers of red hot lava flowing out of the volcano; these
cool and become rock. Over time, more rock is formed on top of the old rock as new lava
flows out and cools.
An example of a volcanic mountain is on the island of Hawaii.
Some volcanic mountains are extinct which mean that they no longer erupt, but others are
active.
The rock formed from volcanoes is very hard and is known as igneous rock.
(God's Amazing Landscapes) 37
