Answer:
Silicate-Oxygen tetrahedro
Explanation:
Silicate-Oxygen tetrahedro are the most abundant and basic structure of common minerals.
These are silicate minerals which formed to silicate rock forming mineral. These constitute about 90% of earth crust. Silica SiO2 consider as most common mineral on the surface of earth also known as Quartz. The the most andundant element in the earth crust is oxygen, mainly found in combine form.
Answer:
The treaty entered into force in 1961 and currently has 54 parties. The treaty sets aside Antarctica as a scientific preserve, establishes freedom of scientific investigation, and bans military activity on the continent. The treaty was the first arms control agreement established during the Cold War.
Explanation:
Answer: No unethical experiment can ever have a positive effect on society.
Explanation:
<span>Cracks in the ground near volcanoes that allow gases to escape are called Vents</span>
<span>North Africa/Southwest Asia (also known as the Mideast) is an excellent example of a region: although is made up of countries on two continents, it is still considered a region because the people in the area share many things, especially religion. </span>
