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When too much salt is detected in the bloodstream, the brain secretes a hormone that helps the body retain water by reducing the amount of urine produced. This is an example of

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Question generated: The starch and water molecules in potato cells are stored in what organelle?

Problem: Write a question you would see in a school textbook.

Answer: A student heated a pan of soup on a stove. While stirring the soup with a metal spoon, the student noticed the spoon became very warm. What is the most likely reason the spoon became warm?

question: Write a question you would see in a school textbook. OPTIONS:
- Copper is a good conductor of heat.
- Copper is easy to melt.
- Copper is difficult to shape.
- Copper dissolves in hot water.
answer: Yumiko gave some reasons why kettles and kitchen pans are often made of copper. Which reason is correct?

An example of a grad-school level question?
An organ pipe produces a musical note same number of nitrogen gas molecules. with a wavelength of 2.72 m. What is the frequency of this note if the speed of sound is 348 m/s?

Random question?
Which of the following properties provides the BEST way to identify a mineral?