Catastrophism was a doctrine that described the Earth to have been formed by a s

Question

Catastrophism was a doctrine that described the Earth to have been formed by a series of slow occurring processes. True False Question 59 1 pts Uniformitarianism states that physical, chemical, and biological laws that operate today operated in the past. True False Question 60 1 pts The subdivision of the geologic time scale that represents the longest time span is called . epoch era period stage Question 61 1 pts The ratio of parent to daughter isotopes in a radioactive decay process is 3 to 5. How many half-lives have elapsed since the material was 100% parent atoms? less than 1 more than 3 between 1 and 2 between 2 and 3

Explanation / Answer

Q. 58) Catastrophism was a doctrine that described the Earth to have been formed by a series of slow occuring processes.

Ans. False.

Because Catastrophism stands for the formations of Earth's crust during geological history have resulted chiefly from sudden violent and unusual events.

Q. 59) Uniformitarianism states that physical, chemical, and biological laws that operate today operated in the past.

Ans. True.

Q.60) The subdivisions of geologic time scale that represents the longest time span is called______.

Ans. Era.

Q. 61. Ans. between 1 and 2.

After one half life parent : daughter ratio is = 1 : 1, as 1/2 parent atoms remain.

After two half life parent : daughter ratio is = 1 : 3, as 1/4 parent atoms remain.

Here parent : daughter is 3 : 5. So, it is between 1 and 2.

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