question: Write a question you would see in a school textbook. OPTIONS:
- Water expands when it freezes.
- The boiling point of water is 100C.
- Water can separate into hydrogen and oxygen.
- The density of water is greater than the density of ice.
answer: Which fact about water is an example of a chemical property?

question: Write a question you would see in a school textbook. OPTIONS:
- have another lab replicate the tests
- look over the results several times
- develop a new hypothesis to test
- change the procedure
answer: A botanist developed a new fertilizer that was tested on different types of plants under different conditions. The results indicated that the fertilizer increased plant growth. Which would be the best way to validate the results?

question: Write a question you would see in a school textbook. OPTIONS:
- Both transfer energy.
- Both require a vacuum.
- Both have the same speed.
- Both have the same frequency.
answer:
Which of the following is a similarity 20 between x-ray waves and sound waves?