Answer:
This fundamental structural unit consists of a silicon cation (black in photo) surrounded by four oxygen anions (red in photo), giving it four negative charges. It is found in all silicate minerals (ie. amphibole, olivine, pyroxene, quartz, feldspar, etc.). The silica tetrahedra may be arranged in chains (ex: pyroxenes), double chains (ex. amphiboles), sheets (ex: micas), and frameworks (ex: quartz, feldspars), forming the basic structure of the planet.
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The answer is: [A]: crater .
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Note: Vents and fissures occur on the sides and flanks of a volcano—NOT the top.
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Answer:
Earth's outermost layer, or lithosphere \(owo)\
Explanation:
plate tectonics, Earth's outermost layer, or lithosphere—made up of the crust and upper mantle—is broken into large rocky plates. These plates lie on top of a partially molten layer of rock called the asthenosphere
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Few people live in the Australian outback, because the outback is a very small part of our world.
Answer:
The answer is D
Explanation:
The government in India has made big efforts to reduce its population growth by educating on family planning and birth control and contraception, from 1965 to 2009. Results show contraceptive usage has been tripled, but still a lot of people in India are iliterate and that is one of the major problems to address. With the use of forced sterilizations in the 70s people from rural areas also stopped trusting the government policies and they did receive many critics about this iniciative.