question: Write a question you would see in a school textbook. OPTIONS:
- a collection of gases held together by inertia
- a group of planets revolving around a single star
- a collection of stars and gases with the Sun as its center
- a group of stars, dust, and planets held together by gravity
answer: Which statement is the best description of the Milky Way galaxy?

question: Write a question you would see in a school textbook. OPTIONS:
- Heat caused the water to become a gas.
- Heat melted the water and it disappeared.
- Salt caused the water to become a gas.
- Salt melted the water and it disappeared.
answer: On a warm sunny afternoon, ocean water splashed onto a rock. A short time later, the rock was dry. Which statement best explains what happened to the water on the rock?

question: Write a question you would see in a school textbook. OPTIONS:
- erosion
- conduction
- condensation
- precipitation
answer:
Which process must occur for clouds to form?