Answer:
Heavy bombardment, solar wind, condensation, frost line, planetesimal, accretion, solar nebula, radiometric dating
Explanation:
The first few hundred million years of the solar system 19s history were the time of the <u>heavy bombardment</u>, during which Earth suffered many large impacts.
The era of planet formation ended when the remaining hydrogen and helium gas of the solar nebula was swept into interstellar space by the <u>solar wind</u>.
Ice can form from a gas through the process of <u>condensation</u>.
Hydrogen compounds in the solar system can condense into ices only beyond <u>frost line</u>.
Our Moon was most likely formed by a collision between Earth and a Mars-sized <u>planetesimal</u>.
Mars was formed by the <u>accretion</u> of smaller objects.
Our solar system was created by the gravitational collapse of the <u>solar nebula</u>.
<u>Radiometric dating</u> allows us to determine the age of a solid rock.
Answer:
my answer is answer2 40,9%
Answer:
The answer is Option B, 3 half-lives.
Explanation:
Potassium–argon dating (K–Ar dating) is a radiometric dating method. It measures the radioactive decay of an isotope of potassium (K) into argon (Ar). Potassium is a common element found in many materials like clay and certain minerals. The technique is best suited to dating minerals and rocks more than 100,000 years old. For shorter timescales, it is unlikely that enough argon (40 Ar) will have accumulated. This dating method is used by geologists and paleoanthropologists in order to understand very great expanses of time and the deposits that the earth has formed. One paleoanthropological example of how the technique has been used is in bracketing the age of deposits at Olduvai Gorge where hominin remains have been found. The scientists have dated lava flows above and below the deposits where fossils have been found. Other paleoanthropological discoveries have also been dated using this technique. It is well suited to sites that show evidence of volcanic activity, as in the case of East African sites like Hadar, Ethiopia.
<span>The Tierra Fria is the elevation zone that is most ideal for livestock. Many animals are domesticated within this area (e.g. cows, llamas, alpacas) because they can withstand high altitudes and are more adaptable to this type of environment. People who often raise livestock on highly elevated areas are usually from China, Tibet, or some parts of America. <span>
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