Mountains - Jolly Phonics Level 4 Readers

Mountains are enormous bits of rock that stand much higher than the ground around them. Some are on their own, while others are part of a chain. They can be many different shapes with rounded tops or jagged peaks. It all depends on how the mountains were formed and how old they are. The top layer of the Earth is called the crust. This crust is made up of several big chunks. These chunks are called "tectonic plates", and they are not fixed in one spot. The sides of these plates hit against each other. When this happens, the layers of rock in the Earth's crust are folded up to form mountains. Many mountains are still growing, while some are getting smaller. As soon as a mountain has formed, it starts to be worn away by the weather. Wind, rain, frost, streams and rivers attack the rock. Slowly, the mountain gets smaller and becomes less jagged. The Himalayan Mountains stretch across four countries. The two highest mountains in the Himalayas are Mount Everest and Kangchenjung...