question: Write a question you would see in a school textbook. OPTIONS:
- a bar of steel
- a bar of aluminum
- an electric current
- an electric charge
answer: Which of these will always produce a magnetic field?

question: Write a question you would see in a school textbook. OPTIONS:
- The mass is reduced.
- The volume is increased.
- The temperature is reduced.
- The pressure is increased.
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. OPTIONS:
- burning candle
- flashlight bulb
- glowing campfire log
- shiny metallic balloon
answer:
Which of these objects is visible because it reflects light toward the eye?