How do mineral substitutions occur?
A) If minerals deep within the Earth's surface melt, elements may mix together and substitute within mineral structures.
B) If minerals in water dissolve, elements may mix together and substitute within mineral structures.
C) Elements that do not have similar ionic charge or size often attract each other and substitute within mineral structures.
D) Elements with similar ionic charge, size, or both substitute for each other within mineral structures.
Question 2
Why does lead have so many industrial uses?
A) It is extremely cheap to mine and process.
B) It has very strong bonds, making is a valuable hard mineral used for vehicles.
C) It is a metal, and therefore is an excellent conductor of electricity and is used for power lines.
D) It can be easily cast, molded, and shaped, as well as be used for its chemical properties in glazes, batteries, and gasoline.
Annual net primary productivity on Earth.
The Tilt of Earth’s Axis
Moon and Earth
Earth, water, air
Effleurage along deep rotator muscles using the knuckles. Slide knuckles from sacrum to hip, tracing ...
Obliquity "Tilt of Earth on its axis"