Rocks
Rocks Rocks This is a mountain. A mountain is made of rock. This is a boulder. It broke off the mountain. This is a stone. It broke off the boulder. This is a pebble. It broke off the stone. This is sand. It broke off the pebble. This is dust. Dust is the tiniest piece of rock. Dust is everywhere.
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Rocks
![](http://cdn.tingduba.com/tingduba/en/Ft6UZ961ubRdKRjeSCrLSr6sAkRt.jpg)
Rocks
![](http://cdn.tingduba.com/tingduba/en/Fu75i91Tfa6QJLBQ5gi3fOlSacEC.jpg)
This is a mountain.
![](http://cdn.tingduba.com/tingduba/en/FrrvvH8ghYg87yDRne7vRyzB9xl3.jpg)
A mountain is made of rock.
![](http://cdn.tingduba.com/tingduba/en/FimzkjyfUrrswBe6MWr_TAXG11Go.jpg)
This is a boulder.
It broke off the mountain.