question: Write a question you would see in a school textbook. OPTIONS:
- is made of minerals.
- is hard and rounded.
- has crystals.
- has mass.
answer: Granite is classified as a rock because it

question: Write a question you would see in a school textbook. OPTIONS:
- It changes color.
- It becomes heavier.
- It changes into water vapor.
- It stops bubbling.
answer: What happens to water when it boils?

question: Write a question you would see in a school textbook. OPTIONS:
- a heavier nucleus.
- a greater atomic mass.
- more electrons than protons.
- more electrons than neutrons.
answer:
A negatively-charged ion has