CBSE Class 7 Answered

Rock Cycle

The process of transformation of rocks from one form to an other in a cyclic manner is known as the rock cycle. It includes the following processes:

• Hot lava cools down to form igneous rocks.
• These igneous rocks are then broken down into small particles which are transported and then deposited. This results in the formation of sedimentary rocks
• When these igneous and sedimentary rocks are subjected to great heat and pressure, they change into metamorphic rocks.
• These metamorphic rocks under heat and pressure breakdown and form hot lava.
• This hot magma then again cools down and forms igneous rocks.