Answer:
Explanation:
La exploración intensiva a la que se está sometiendo el planeta Marte nos está revelando gran cantidad de datos sobre sus propiedades y sobre su pasado. Sin embargo, existen dos grandes incógnitas por desvelar: ¿cuáles fueron las diferencias que provocaron que el planeta sea tan distinto de la Tierra? ¿Existe o ha existido actividad biológica en el planeta rojo? Especialmente revelador es el estudio comparativo de ambos planetas.
Desde la distancia, la Tierra y Marte nos muestra profundas diferencias. En el primer caso, dominan blancos y azules, correspondientes a las nubes y a los océanos, y los marrones de los continentes. Por tanto, la existencia de agua en sus diferentes estados (sólido en los casquetes polares, líquido en los mares y gaseoso en la atmósfera) es evidente. Y la presencia de agua sugiere, de manera casi inmediata, la existencia de vida. De hecho, incluso desde satélites en órbita es posible apreciar la intensa actividad biológica del planeta, como es el caso de las banquisas antárticas o el cambio estacional de la superficie forestal.
<span>In archaeology, absolute dating is most accurate archaeology dating system that can even give a calendar year to the object. It is more dependent on laboratory analysis.
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</span><span>Some of the absolute dating methods are :
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</span><span>1) Radiocarbon Dating In Archaeology : All living being absorb carbon C12 and some amount of radiocarbon c14. Scientist have record of C14 in different organisms. After death radioactive carbon c14 starts to decay. Scientist compare the lose of c14 with actual amount of C14. the missing amount can determine the date the object to a precise period. Can be used only on organic matter.
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</span><span>2) Uranium - Lead Dating Technique In Archaeology: Rocks, that are formed by volcanic reaction or cataclysmic event, contain a small amount of radioactive substance. From the day the rock is formed its radioactivity begins to deplete. Like C14, by measuring the loss, the scientist can determine an age according to known loss rates.
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</span><span>3) Luminescence Dating In Archaeology</span>
<span /><span>Artefacts that are formed from crystalline materials and unearthed can be dated using luminescence analysis.Crystalline minerals when burnt in intense heat will produce different colors of flame.Mostly used to date pottery in archaeology.</span>
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Answer:
c. dependent variable
Explanation:
In research, the <u>independent variable</u> is the variable that can be manipulated by the researchers and which will have an effect on another variable that is called the dependent variable. (Therefore, the variable in which the affect is perceived is called the dependent variable). The researchers don't really have control over the dependent variable but it is the one that it's being tested and see how it responds to the independent variable.
In this example, the race of a criminal offender seems to determine the frequency with which capital punishment is administered. We can see that apparently, <u>the race of the criminal offender affects the punishment and how frequent it is received. </u>Therefore, since the race is affecting the frequency of the capital punishment, we can say that the punishment can be considered the dependent variable.
Speaker 1: The will of the people is what is best for society.
Speaker 2: People exchange some of their individual freedoms for protection by the government.
Speaker 3: Governments should be divided into branches that are <span>separate but equal.
</span>Speaker 4: Governments derive their powers from the consent of the <span>people.
The </span><span>Baron de Montesquieu would most likely agree with the Speaker 3, as it was Montesquieu who theorize first that a government should be divided into branches that are separated but equal (the three branches should be executive, legislative and judiciary), in order to avoid that one of the three could acquire more power than the other and as a form of control of democracy.</span>
