154 Answered Questions for the topic TOEFL

Toefl

11/30/13

I have a question about a practice test!! I would like to know why. The correct answer is A. I chose C.
Another radioactive element useful for dating is carbon-14, which decays into nitrogen-14. With a half-life of 5,730 years, carbon-14 decays much more rapidly than radium 87 and so is useful for... more
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Toefl

11/29/13

I have a question about a practice test!! I would like to know why. The correct answer is A. I chose B.
The final state, which some demographers have called the postindustrial stage, occurs when birth rates and death rates are about equal. In this case there is zero natural population growth. Over... more
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Toefl

11/29/13

I have a question about a practice test!! Why is the correct answer is A? I chose B.
Historically, as countries have developed industrially, they have undergone declines in death rates followed by declines in birth rates. Over time they have tended to move from rapid increases in... more
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Toefl

11/27/13

I have a question about a practice test!! Why is the correct answer is D? I choose A.
The idea that life did not originate on Earth, but was carried here either deliberately or by natural processes, has its roots at least as far back as the Ancient greeks This idea, often referred... more
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