question: Write a question you would see in a school textbook.
answer: Which of these will always produce a magnetic field?

question: Write a question you would see in a school textbook.
answer: When water evaporates from Earth's surface into the atmosphere, its molecules enter the gas state. What change in this gas causes molecules to condense into the small water droplets that form clouds?

question: Write a question you would see in a school textbook.
answer:
Which of these objects is visible because it reflects light toward the eye?