question: Write a question you would see in a school textbook. OPTIONS:
- The glass contracts when heated.
- The alcohol contracts when heated.
- The glass expands more than the alcohol when heated.
- The alcohol expands more than the glass when heated.
answer: Colored alcohol is used in some glass thermometers. When placed in air of different temperatures, the column of alcohol rises or falls in the glass thermometer. Which of the following best explains why the height of the alcohol column changes?

question: Write a question you would see in a school textbook. OPTIONS:
- They all produce light.
- They all cause vibrations.
- They all convert heat to energy.
- They all need gravity to move.
answer: What do playing a guitar, banging a drum, and dropping a pebble in the water have in common?

question: Write a question you would see in a school textbook. OPTIONS:
- volcanoes
- the remains of living things
- gases in the atmosphere
- water trapped inside rocks
answer:
Fossil fuels were formed from