question: Write a question you would see in a school textbook. OPTIONS:
- ocean tides
- time of day
- energy from the Sun
- phases of the Moon
answer: The gravitational attraction of the Moon causes which effect on Earth?

question: Write a question you would see in a school textbook. OPTIONS:
- fly south
- find food
- protect their young
- survive the winter
answer: Some birds build nests in the spring. This nest building is a seasonal adaptation that occurs to help the birds

question: Write a question you would see in a school textbook. OPTIONS:
- A log gives off heat and light as it burns.
- A tree stores energy from the Sun in its fruit.
- A penny lost in the grass slowly changes color.
- A water pipe freezes and cracks on a cold night.
answer:
Which of the following is an example of a physical change but not a chemical change?