question: Write a question you would see in a school textbook. OPTIONS:
- move quickly through the water.
- breathe oxygen from the water.
- hide from predators.
- use food faster.
answer: When an octopus feels threatened, it can release black ink into the water. The ink MOST likely helps the octopus

question: Write a question you would see in a school textbook. OPTIONS:
- using a computer to graph results
- verifying that results match the original hypothesis
- comparing the results with those of other scientists
- eliminating any results that appear to be abnormal
answer: Which step will most likely ensure that the results of an investigation are valid?

question: Write a question you would see in a school textbook. OPTIONS:
- density
- mass
- shape
- volume
answer:
A student has two solid samples of the same substance. Which property do the substances most likely have in common?