Radiometric dating is a technique used to determine the age of rocks. Geologists have used this technique to determine that:

Q: A paleontologist estimates that when a particular rock formed, it contained 12 mg of the radioactive…

A: Earlier, paleontologists were only able to understand biological succession, they weren't aware of…

Q: When considering the entire period of time during which life on Earth has been evolving, we must…

A: To understand the change in flora and fauna that have occurred over million of years on Earth ,we…

Q: Why is it hard to create a timeline of events chronicling Earth’s History?

A: There are timeliness but they are often conjectured and who can argue with them with an alternative.…

Q: 41. Below is a list of major events that occurred in the history of life. Write the letter…

A: The history of life traces the events that occurred in the formation of organisms on the earth. It…

Q: What evidence would you look for on one of these moons that would tell you that life may have…

A: The proof that we would look at Moon is about the indication for aspects of life.For example-…

Q: Why is it difficult for scientists to place an old paradigm with a new paradigm?

A: Hi, since you have asked multiple questions, we will solve the first question for you. If you want…

Q: In the 1950s, scientists Miller and Urey conducted a classic experiment in which water, methane,…

A: Evolution is the study of origin of earth, origin of life on earth and relationship between…

Q: Which of the following did Stanley miller place in the experimental system to show that organic…

A: Stanley Miller and Harold Urey's experiments reported evidence of chemical evolution or Chemogeny.…

Q: Match each of the following key events in the history of Earth and life with its approximate date,…

A: The evolution is an important during thus event many population was appered on earth and many…

Q: Martian meteorites found in Antarctica were determined to possibly contain life. Scientists looked…

A: Known as ALH 84001, the Martian rock whose remains were present in meteorites contained structures…

Q: List several significant events in the history of life on earth that are associated with the K-T…

A: KT boundary is the boundary between the age of reptiles that occurred in the Mezoxoic era and age of…

Q: Which of the following pieces of evidence prompted researchers to abandon the hypothesis that a…

A: Iridium is an element belong to the platinum group and is the rarest and most densest element. Its…

Q: What evidence would you look for on Enceladus, Europa or Mars that would tell you that life may have…

A: Europa is the smallest of four Galilean moons orbiting Jupiter. Enceladus is the sixth-largest moon…

Q: What was the composition of the earth’s atmosphere at the time of the origin of life, and how did it…

A: Earth was originally in the molten lava state mainly consists of hydrogen sulfide and other…

Q: What is the most accepted hypothesis on the origin of life on earth? How does it compare to the…

A: Introduction The heterotrophic hypothesis on the origin of life is the most compelling and widely…

Q: - How much time does it take for 1 half-life to occur?   -Approximately how many half-lives are…

A: Carbon is the element that is most commonly found in organic molecules. All organisms have a carbon…

Q: Relative-Age Dating Absolute-Age Dating Younger 440 mya 480 mya 520 mya 545 mya Older 2. The dates…

A: Ans: C: Igneous rock layers

Q: radiometric dating

A: two isotopes of uranium are used for radiometric dating . uranium -238 decays to form lead -206 with…

Q: What argument convinced most scientists in the 1800s that Earth was more than 6,000 years old? O The…

A: Introduction All life on earth began from the universal last common ancestor which lived 3 to 4…

Q: Why are scientists interested in the primordial synthesis of organic molecules when it comes to the…

A: Introduction: The Oparin-Haldane hypothesis proposed that inorganic molecules in the atmosphere of…

Q: The most useful method for dating ancient calcium rich cave deposits would be Group of answer…

A: Answer :- Option (D) is correct. - Uranium-Thorium Dating.

Q: HOW OLD IS EARTH?   HOW LONG DID THE LONGEST EON (SO FAR) LAST?

A: Different planets have different atmosphere.

Q: which term describes any ancient remains, impressions, or traces of an organism or traces of its…

A: Certain minerals may be smelted more easily than others, and these are known as ore minerals.…

Q: Which scientists investigated the origins of organic molecules on the primordial Earth?

A: Evolution is a continuous process and we are still evolving. Evolution is nothing but adapting to…

Q: Which of the following is characteristic of the end of the Paleozoic Era? a There was a mass…

A: As experts believe, the Earth was formed as a result of the Big Bang Explosion. The geological time…

Q: 1. For how long has there been life on earth? 2. For what percentage of time has life existed on…

A: ​The geological time scale relates layers of rock (stratigraphy) and carbon dating to periods of…

Q: Which parent isotope is most useful for dating samples that are greater than 100 million years old?…

A: Radioactive decay is a process in which the unstable isotopes (natural) emit radioactive particles.…

Q: Use the following figure to answer questions 2 and 3. mya - million years ago 1,400 mya -1 bilkan…

A: Earth was formed in our solar system along with other planets, and its age is about one third of…

Q: Radiometric dating ... Group of answer choices A: is based on the scientific observation that…

A: Answer  E) all of these answers are true

Q: Radioisotopes are useful in dating fossils and rocks because

A: Fossils  They are remains of animals which are preserved in ice or in deep underground or inside…

Q: Which of the following do not provide evidence that a meteor strike was a partial cause of the…

A: About 65.5 million  years ago KT extinction event occurred which wiped off the dinosaurs from the…

Q: How would you describe earth of millions year ago

A: It is believed that our planet Earth is about 4.54 billion years old.  About 3.5 billion years ago…

Q: An organism dies,and its body leaves an impression in mud. Over time, the mud hardens into rock, and…

A: The cells are the primary unit of life. Based on the number of cells an organism may be unicellular…

Q: Which of the following theories as regards the origin of life on earth is accepted today? A. Theory…

A: The origin of life on earth is known to arise from the non-living matter, organic compound. The…

Q: Fill in the blanks. The parentheses after the blank represent the choices for each blank.…

A: Gondwana was the ancient supercontinent which existed millions of years ago. At that time, primitive…

Q: The Miller experiment did not create life, nor did the gases used resemble Earth’s first atmosphere…

A: In 1952 Miller and urey conducted experiments to hypothesize the formation of complex organic…

Q: 1) What piece of evidence initially convinced Dr. Alvarez that a mass extinction had occurred at the…

A: Fossils are the geologically preserved remains of previously lived animals, plants, or other living…

Q: Suppose a scientist finds a rock with an interesting fossil. Curious to know the age of the fossil,…

A: As per the data given, the Rb-Sr isochron equation is -   ( 87Srt /86Srt ) = ( 87Sr0 / 86Sr0 ) + (…

Q: Critics of evolution often cite the fact that several hypotheses are being tested to help explain…

A: Introduction  Evolution is the process of a species' features changing over numerous generations…

Q: We live in the Cenozoic era, and scientists know more about this era and the epochs it’s divided…

A: The term 'Cenozoic' refers to a period of time ranging from 66 million years ago to the present day.…

Q: When a radio-isotope in a fossil with a half-life of 4,000 years has been reduced to 25% of its…

A: Scientists use a clock to calculate the date a rock or fossil was generated in order to ascertain…

Q: Oparin-Haldane hypothesis

A: Answer:

Q: Scientists are examining the possible role of a large asteroid in the cretaceous mass extinction…

A: Introduction :  Small, airless rocky bodies revolving around the sun between the orbits of Mars and…

Q: A. How old is the Earth? B. How long did the longest eon (so far) last? C. How many years ago did…

A: Epoch is longer than era. Eon is the longest period of geological time.

Q: When scientists try to assess the habitability of Mars, what is their guiding principle, based on…

A: Introduction Life:- It is defined as any system capable of performing functions such as breathing,…

Q: Radiometric dating ... All of these answers are true O provides an accurate means of determining the…

A: Radiometric dating  Technique used to date materials such as rocks by observing the abundance of…

Q: What type of plates that float on top of the mantle do scientist believe that the Earth's crust is…

A: The earth is made up of different layers: 1)The Inner core- It is the inner and hottest layer of the…

Q: The Miller-Urey experiment was a landmark step in our understanding of the origins of life. But what…

A: Introduction Stanley Miller and Harold Urey devised a test to put Oparin and Haldane's theories to…

Q: 19.Approximately how old is earth? Group of answer choices a.about 4.567 billion years b.about a…

A: Fossils are dead plants and animals that have been preserved in sedimentary rock or other crust…

Paleontology

A branch of science concerning the scientific study of life from ancient times is known as paleontology. The scientists working on paleontology are known as paleontologists. Paleontologists collect the fossils of organisms from ancient times to classify them. The paleontologists also study the environment from ancient times to study the interactions between different organisms.