Rocks

Types of igneous rocks: Granite, Obsidian, Pumice, Basalt, Diabase, Grabbo
Types of Metamorphic rocks: Slate, Gneiss, Quartzite, Marble
Types of Sedimentary Rocks: Conglomerate, Sandstone, Shale Gypsum, Halite, Limestone, Coal

Talc and Mica are used to make cosmetics
Fluorite is used to make toothpaste
Plaster of Paris is used to make bandages
The thermometer is made from Mercury that is extracted from Cinnabar
Surgical Instruments are made from Titanium which is extracted by rutile
Copper is extracted from chalcopyrite
Alloy is a combination of metal and or types of metal or elements for making musical instruments
Slates are used for roofing
Marble tiles for walls and floors
Wall built with granite blocks, Limestone and Sandstone
Shale and limestone are used to make cement

When animals or plants the soft part decay
The dead animals leave behind their harder parts like skeletons and shells and the dead plants leave their impressions
Slowly the remains are replaced with minerals and become fossils

The study of fossils is called paleontology
If fresh fish fossils are found in an area the surrounding area is likely to be a river
Trilobites exists 500 to 600 million years ago
The oldest crab fossils are about 470 million years old and Horseshoe crabs are still existing today
The oldest fossils of Archaeopteryx are about 150 million years ago