Random question?

Which two body systems are directly involved in movement?

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Question generated: Sugar is composed of carbon, hydrogen, and oxygen. Sugar is an example of which of the following?

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

Answer: The surface of the Moon is made up of

question: Write a question you would see in a school textbook. OPTIONS:
- A different mixture is formed in each case.
- A different solution is formed in each case.
- Both a change of state and of elements is involved.
- New molecules are formed but the same elements exist.
answer: Oxygen reacts with iron to produce rust and with hydrogen to produce water. Which statement describes both reactions?

An example of a grad-school level question?
The Great Basin in Nevada is characterized by uplifted, tilted blocks forming mountain ranges and downthrown blocks forming basins. What rock type is MOST likely to form in the basins?

Random question?
Colored alcohol is used in some glass thermometers. When placed in air of different temperatures, the column of alcohol rises or falls in the glass thermometer. Which of the following best explains why the height of the alcohol column changes?