question: Write a question you would see in a school textbook. OPTIONS:
- How Baking Soda Reacts With Vinegar
- How Rust Can Be Scraped off of Metal
- How Metals Respond to Electrical Currents
- How Elements Can Change Phase When Heated
answer: A teacher asks her students to examine titles of four scientific articles. Which titled article is specifically about a chemical change?

question: Write a question you would see in a school textbook. OPTIONS:
- area.
- perimeter.
- density.
- weight.
answer: The ratio of an object's mass to its volume is its

question: Write a question you would see in a school textbook. OPTIONS:
- discovering new reservoirs of water in the aquifer
- reducing water usage through conservation measures
- combining hydrogen with oxygen to make water
- piping in water from an aquifer elsewhere
answer:
As the population in an area grows, water usage increases. Eventually, water usage can outstrip the supply. Which measure to increase the amount of available water demonstrates the best stewardship of the resource?