Which of the following pairs of minerals is NOT part of the same nonsilicate mineral group?
A. pyrite and galena
B. plagioclase feldspar and potassium feldspar
C. calcite and dolomite
D. hematite and magnetite
Answer: B
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What countries produce tantalum, a mineral used in cell phones?
A) Rwanda B) South Africa C) Democratic Republic of the Congo D) Rwanda and Democratic Republic of the Congo E) all of the above
There are two ways in which Earth's layers can be classified: chemical composition and physical properties. Briefly describe the different layers by their chemical composition and then by their physical properties
Dendritic cells transport protein fragments of invading viruses or bacteria to which of the following?
A) an MHC B) Th cells C) both a and b D) neither a nor b
List the four basic types of air masses. Give an example of where each type could originate.?
What will be the ideal response?