This type of mineral is used in baby powder.
What is Talc?
This is melted rock within the Earth's surface.
What is magma?
This type of rock has a value on the hardness scale.
What is a diamond?
A rock that is mined because it contains a useful substance.
What is ore?
The Great Wall of China is built from this kind of rock.
What is granite?
This type of rock is the hardest on Mohs Hardness chart.
What is a diamond?
This is melted rock that reaches the Earth's surface.
What is lava?
Some rocks can be heated and turned into this useful material used in windows, eye lenses, etc.
What is glass?
A rock used for energy.
What is coal?
This ore is used in cans, pots, pans and some baseball bats.
What is aluminum?
This shiny black rock looks like black glass.
What is obsidian?
This is rock formed with tiny pebbles and stones stuck together. It can be rough and chunky.
What is conglomerate rock?
This mineral is used to flavor food.
What is salt?
A mineral rubbed against a white piece of paper or rough white tile to determine it's properties.
What is streak?
This mineral found in California started a RUSH in 1849.
What is gold?
This indicates a rocks shine.
What is luster?
Deep inside the Earth rocks squeezed and heated can change into other rocks.
What is metamorphic rock?
This type of rock is formed when melted rock cools near the Earth's surface.
What is igneous rock?
The way a mineral splits apart.
What is cleavage?
The continual change of one rock changing into another type of rock.
What is the rock cycle?
How many values are on the Hardness Chart?
What are 10?
This type of rock can be used for roofs.
What is slate?
A rock formed when tiny particles of dead plants, and animals and pressed together in layers.
What is sedimentary rock?
A living thing from long ago.
What is a fossil?
This is a mineral used in the US penny.
What is copper?