question: Write a question you would see in a school textbook. OPTIONS:
- rate at which the elements chemically react.
- hardness of the elements.
- structure of the atoms of the elements.
- radioactivity of the atoms of the elements.
answer: The periodic table of the elements is systematically organized according to the

An example of a grad-school level question?
Which of the following activities is the best example of instinctive behavior in an animal?

I just took a test in school today. What question was I asked?

Question I was asked: What is the main function of scales on a fish?

Random question?

Early scientists most likely saw a discharge of electricity for the first time when observing a

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Question generated: The orbit of Earth is almost circular and has a period of about 365 days. Compared to the orbit of Earth, which of these objects usually have highly elliptical orbits and can have periods of over 1000 years?

question: Write a question you would see in a school textbook. OPTIONS:
- oxygen
- nitrogen
- beryllium
- magnesium
answer:
Which element is most likely to form an ion with a negative 2 charge?