Answer:
200 million years
Explanation:
It is considered that Pangea began to break about 180 million years ago. When Pangea started to break is when we have the beginning of the continental formation that we have nowadays and the start of the birth of the Atlantic Ocean between South America and Africa.
Answer:
A.
Explanation:
Based on the information provided within the question it can be said that the best option in this scenario for finding the age of these fossils would be to collect a sample of the volcanic ash layers above and below the fossil layer and date the volcanic deposits with Argon dating methods. Such a method would be Potassium-Argon dating in which the product of the radioactive decay of an isotope of potassium (K) into argon (Ar) are compared in order to calculate an estimated age.
A questionnaire item, distributed to a random sample of adults, reading "Are you not in support of nationalized health care", with a yes or no possible response, would violate the concept of "Avoid negative items."
Option d
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Explanation:
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While doing a research study the researcher has to formulate the questionnaire according to the field of research. In this type of questionnaire based data research, one has to give at most importance to the target audience whom the research is meant for.
To get better data from target group on has to develop a questionnaire which avoids the negative items because the target group should not be confused while giving their opinion.
So, before preparing a questionnaire one has to clearly study and understand the nature of group and their attitude towards the particular segment of research to avoid negative items.
The correct answer is controlled
Explanation: Unlike many recent interpretations of Beethoven’s piano sonatas, the recitalist’s performance was a delightfully free and introspective one; nevertheless, it was also, seemingly paradoxically, quite <u>controlled.</u>
