Answer:
Quartz is not pure in this rock.
Explanation:
When quartz shows effervescence in contact with an acid, it means that it is not in its pure state, but rather related to other substances that may be cementing the quartz. This effectiveness is caused by substances that do not react like quartz, such as calcite.
In this case, we can conclude that in relation to the calcium-rich rock shown in the question above, the calcium is not pure, but it is likely to be related to calcite, or other material that does not react to acid.
<span>Gypsum originated 200 million years
ago as a result of marine deposits when part of what are now our continents
were immense oceanic extensions. During this period some seas were dried
leaving plaster beds that were covered to be discovered later by man. Since the
time of memory plaster has coexisted with humanity and constitutes one of the
oldest building materials.</span>
When I finished the quiz it said the answer was
Correct Answers should include the following … Sustainable development in South America is also important due to the fact that we, as a nation, consume many products from the region. While it might be easy to look the other way as helicopters dump pesticides on banana plantations or coastal areas are undergoing severe overfishing, the fact is that these practices will impact our nation eventually. The United States will pay the costs with health related issues or higher prices due to lack of supply. If resources become depleted and other ecosystems are adversely affected, our nation has the potential to suffer as well. In this age of globalization, many people believe that we, as a worldwide community, have a responsibility to get involved and help promote sustainable development around the globe. High population growth generally coincides with low education levels and poor health care. Overpopulation diminishes resources in a country and increases poverty. Overpopulation in South America even impacts the United States due to the increased migration of citizens looking for a better life and a way out of the poverty of their home country.
The largest sea in the world is the Philippine sea
