Question 1
Which of the following describes the light reflecting and transmission characteristics of a mineral?
◦ color streak
◦ virtual absorption
◦ fluorescence
◦ luster
Question 2
When a mineral fractures along a cleavage plane, what does this suggest about the crystal structure of the mineral?
◦ The crystal contains warped planes called twin planes that weaken the crystal structure and allow it fracture along a planar surface, causing cleavage.
◦ The crystal structure contains planes along which chemical bonding is much weaker than other directions.
◦ The atoms are arranged in a simple orderly arrangement with uniform bonding.
◦ The crystal grows only planar faces that become weak zones that form cleavage.
The subunit structure and function of the ATP synthase
Eukaryotic structure
Amino Acid Structure
Mining Mineral Resources
The elements of chromatin structure
Plasmid structure