question: Write a question you would see in a school textbook. OPTIONS:
- The acid boiled when poured into the beaker.
- The acid and powder formed a new product.
- A physical reaction produced a gas mixture.
- A reaction occurred that produced heat.
answer: A chemist observed bubbling and fizzing after adding an acid solution to a white powdery substance in a beaker. Which of the following can be inferred?

question: Write a question you would see in a school textbook. OPTIONS:
- supporting the body and enabling it to move
- transporting oxygen, wastes, and nutrients throughout the body
- producing male and female gametes
- conducting messages to coordinate body functions
answer: The brain, spinal cord, and nerves are organs that perform which primary function?

question: Write a question you would see in a school textbook. OPTIONS:
- have the same number of protons.
- share the same atomic structure.
- have similar physical characteristics.
- share the same number of neutrons.
answer:
Elements in the same column of the Periodic Table of the Elements all