Geologists have recently determined that the minerals goethite and hematite exist in abundance on Mars, sure signs of the presence of water (see Figure 1 for a picture). None of those geologists have been to Mars, of course, but the unmanned rovers Spirit and Opportunity have. These rovers are equipped with three mass spectrometers, each of which is capable of determining the chemical composition of a solid with a high degree of accuracy. With such a precise chemical analysis in hand, geologists on Earth had no problem identifying the minerals.
A mineral is defined in part by a specific chemical composition. In theory, therefore, it is always easy to identify a mineral, if you can determine the chemical composition with a mass spectrometer like the Mars rovers. In reality, however, even if you are looking at rocks on Earth, determining the exact chemical composition of a substance involves significant time preparing the sample and sophisticated laboratory equipment (and often significant money). Luckily, it is usually unnecessary to go to such lengths, because there are much easier ways that require little more than a magnifying lens and a penknife.
Answer:
From the listed countries the country that struggles with corruption is Romania - the correct answer is d. Romania
In fact, corruption was one of the major obstacles in Romania's accession to European Union. It is a major problem because it takes up a big part of money- including the subsidies that it receives from the European Union.
Mesoamerica is different from <span>Central America.
</span>Mesoamerica<span> is referring to a region up to the North of Mexico. In the South-West, it also covers the nowadays states of Belize.
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Hope this helps :)
<h3>Option C</h3>
Trade that guarantees fair prices and ethical purchases would definitely mean to have a fair trade as one is not being too demanding or unfair in this sort of business.
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