ROCKS By Ilse P. Warning: contains jokes (Minerals (Crystal structure,…
ROCKS By Ilse P.
Warning: contains jokes
Rocks are made of more than one mineral, with no definite chemical composition or crystal structure.
Forms when lava or magma harden
Slow cooling magma
Colorful (example: granite)
Small crystals or glassy
Fast cooling lava
Can have holes from air bubbles (example: pumice)
Glassy example: obsidian
Lava and magma come from volcanoes...
Formed by heat and pressure
Heat changes structure but doesn't melt
Can also be formed by tectonic plate collisions
Formed when sediments compact together. Deposited in layers and contains sand, pebbles, and frequently fossils.
Broken down by weathering and erosion
Can be Organic
Rocks can change from one type or rock into another because of the rock cycle.
People mine to obtain ores, minerals, and gems.
Open pit mining
Mining requires reclamation (returning the land to it's original state or better)
Wildlife is valuable!
Save the forests!
(Not a joke)
Have a nice day!
Or Dragons! =)
(If you know me, you know I had to make a dragon reference.)