1. Pebbles Sand Silt Geologist

2. How do these pebbles turn into sand???

3. gravel Silt cobbles clay boulder pebbles sand Clay Silt Sand Gravel Pebbles Cobbles Boulders

4. ClaySiltSandGravelPebbles CobblesBoulders Which of these is the size of dust ? It is the smallest rock you have studiedCLAY Pieces of rock that are the size of dust

5. Collection

6. reddish bubbly rock. Once the top of the lava Scoria-

7. light, soft, smooth rock that comes from the ashes of the volcano Tuff-

8. grey rock that was once hot liquid lava Basalt

9. chalky rocks

10. siltsand humus = dead plant materials These earth materials make_______ soil.