9.2. The rock cycle
9.2.1. Working with texts. The rock cycle.
Look at the graph, read the sentences and then put them into the correct order.
Energy for the rock cycle is provided by radioactive decay in the interior of the Earth while the surface processes of the cycle are powered by solar radiation.
Molten rock from the interior of the Earth finds its way to the surface through volcanic eruptions.
As a result of this process surface rocks turn into sediments.
Compaction and cementation result in sedimentary rocks.
During millions of years, deposited sediments go through the processes of compaction and cementation.
Lava crystallizes on the surface.
Metamorphic rocks melt because of the internal heat of the Earth and the cycle starts again.
Sedimentary rocks turn into metamorphic rocks as a result of high temperature and pressure.
Sediments ate transported and then deposited in seas and lakes.
Surface rocks fragment and change on the surface through weathering and erosion.
This process is also known as metamorphism, and takes place under the surface.
When molten magma reaches the surface it is called lava.