Glencoe Science Earth Science Grade 6
Makes up 30% of earth's continental crust.
Quartz
Name two uses for minerals
1) They make gems, which are rare and beautiful. 2) Minerals are useful for their physical properties and for the elements they contain.
What is the blue Hope diamond?
A diamond that has caused misfortune to the owner and his whole family.
Explain why the Cullinan Diamond is an important gem.
It was the largest uncut diamond ever discovered. It is also called the Great Star of Africa and is found in the sceptre of British Crown Jewels.
Mineral that composes a large part of Earth's upper mantle.
Olivine, present in Moon rocks.
Identify what do rubies and sapphires have in common.
Rubies and sapphires have corundum in common. If iron or titanium is are in the Corundum it gives off a blue color. If Chromium is in the corundum it gives off a red color.
Ore minerals that make up titanium
Rutile and ilmenite
Explain why bauxite is considered a useful rock?
The bauxite rock is considered a useful rock because aluminum comes from it. The powdered that comes from it, makes bicycles, soda cans, foil, utensils
Thinking Critically: Titanium is nontoxic. Why is this important in the manufacture of artificial body parts?
Titanium is nontoxic because it is not allergic to the skin, its is lightweight and durable.
Describe how vein chemicals are formed
Vein minerals are formed by metallic elements that dissolved in fluids. The fluids travel through natural fractures and surfaces, and between layers of rock. The mineral left behind fill the open spaces.
The process of coating iron with zinc to prevent rust is called
galvanization
Iron comes from what ore
hematite
The most valuable topaz contains
yellow, pink, and blue coloring
