Random question?

What should a scientist do to help make sure the results of an experiment are unbiased?

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Question generated: Which human organ system exchanges gases with the environment?

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

Answer: A student provides the following directions for brushing teeth: Turn on the water. Fill the glass with water and leave the water running. Put toothpaste on the toothbrush. Brush for two minutes. Rinse mouth with the water from the glass. Rinse the toothbrush with the running water. Turn off the water. Which change in these directions would conserve the most water?

question: Write a question you would see in a school textbook. OPTIONS:
- intrusive structures
- metamorphic rocks
- volcanic mountains
- sedimentary rocks
answer: Which of these structures form when materials are deposited, buried, and cemented?

An example of a grad-school level question?
Sedimentary deposits formed from organic material tend to include a high amount of

Random question?
About how often is a full moon observed from Earth's surface?