Rocks

SCIENTIFIC OBSERVATIONS
Animals | Bacteria | Fungi | Plants | Rocks | Sky | Streams


[Expect this page to be fully updated by September 2017]


When observing ROCKS & MINERALS, you might consider details such as…

 color
– feel (does it feel greasy? does it feel soapy?)
– taste (does it taste salty?)
– texture (does it crumble with light pressure? does it break off in thin sheets?)
– solubility in water
– relative hardness, which you can determine using a fingernail, coin, or knife
– the visible streak left by the rock when rubbed onto a unglazed piece of porcelain
– the production of bubbles when exposed to (weak) hydrochloric acid
– luster (e.g., does it appear dull or metallic?)
– relative mass


Last updated: April 2017

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