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.
A). Jewish And African Religions
''Most Europeans speak more than one language'' this statement best describes how Europeans have adapted to their vast language diversity.
Answer: Option C
<u>Explanation:</u>
In Europe, people are proficient in more than one language which shows that they have adapted to the vast language diversity. Statistics reveal that 54% of people in Europe can speak two additional languages in addition to their native language. 25% people are able to converse in at least 2 languages and 10% of the people can speak three different languages.
Answer:
Ivan was born in Russia, but his mother was born in the United States.
Ethan’s parents were both born in Israel, but he was born in the United States.
Pedro’s parents were both born in Spain, but he was born in the US territory of Puerto Rico.
Explanation:
If you are born in the US you are automatically a citizen. If one parent is born in the US you are a citizen.
Abyssal plains are large, flat features that cover about one third of the planet.
<h3>What are Abyssal plains?</h3>
- The broad, flat, sediment-covered regions of the deep ocean floor are known as abyssal plains.
- They have a slope of less than one foot of height variation for every thousand feet of travel, making them the flattest, featureless places on Earth.
- When tectonic plates separate, magma rises and forms new crust, filling the space that was left between the plates.
- When sediments from the shoreline pass over the continental shelf, tumble down the continental slope, and deposit on top of the more recent oceanic crust, they create an abyssal plane.
Learn more about Abyssal plains here:
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