question: Write a question you would see in a school textbook.
answer: 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?

question: Write a question you would see in a school textbook.
answer: Which of these are broken down during chemical, but not physical, changes?

question: Write a question you would see in a school textbook.
answer:
Biotic forces can cause changes to the surface of Earth. Which is the best example of living organisms causing weathering?