Rocks are constantly on the move. Eroded by water, sinking into the sea, and ejected by volcanoes, rocks have their very own cycle of existence.
- The rock cycle is the process of rocks weathering away and creating new rocks.
- Over time weathering reduces rock to tiny grains of sand.
- The wind transports the sand, which builds up on seabeds and eventually becomes sedimentary rocks.
- Deep in the Earth, high pressure and temperature melt rocks into magma which is produced during volcanic eruptions.