question: Write a question you would see in a school textbook. OPTIONS:
- very little energy is produced.
- ecosystems can be damaged.
- it contains harmful bacteria.
- it is a very rare resource.
answer: Many communities in the United States use coal to produce electricity. One problem with using coal is that

question: Write a question you would see in a school textbook. OPTIONS:
- A hummingbird carries food to the plant.
- A hummingbird helps the plant reproduce.
- A hummingbird protects the plant from predators.
- A hummingbird makes the flowers produce nectar.
answer: Nectar is a sweet liquid that some flowering plants produce. A hummingbird drinks nectar from a flower. When a hummingbird drinks nectar, pollen from the flower sticks to the hummingbird's beak. The picture shows a hummingbird drinking nectar from a flower. Which statement explains the role of a hummingbird in the life cycle of a flowering plant?

question: Write a question you would see in a school textbook. OPTIONS:
- 1,000,000 years
- 100,000 years
- 10,000 years
- 1,000 years
answer:
Swamp plants die, fall to the ground, and are buried by other dying plants. Approximately how long would it take for plants to possibly become a fossil fuel?